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In Home Theater Audio gear: short for pre-processor. In simple terms, it's the 'brains' of a home theater system. Usually a preamp for home audio systems that has the D/A converters (digital signal processing) built in and distribute the analog audio to self powered pro speakers or block amps in high end systems. Example: Marantz AV8801. Units have HDMI or USB inputs that can process the complex digital signals (ex. DTS, Dolby, etc.) and output it in RCA or XLR (analog) formats.

THE BASICS >>>>>

Block Amp - Audio amplifier with zero controls

Pre Amp - Source Selection, Audio Volume control, no amplification.

Pre-Pro - An pre amp with digital processing built in.

Integrated Amp - A preamp and block amp combined in one unit

Receiver - An integrated Amp with a tuner (Radio) and/or pre-pro built in. Everything in one box.

Pre-Pro primary functions include:

- Source selection

- Volume control

- Multi-channel digital to analog conversion

- Delays and volumes for individual speakers

- Upmixing, from 5.1 to 7.1 for example

- Bass management
Secondary Functions -

- High resolution audio format decoding

- Room correction

- Video scaling

- 2nd and 3rd zones

- Media streaming

- Internet radio
I bought an Onkyo PR-SC5509 pre-pro so I could play a bluray on my laptop, go HDMI directly from my laptop to Balanced XLR output to run my Mackie SA1532 professional loudspeakers, also run my Home Theater Receiver to get surround sound in my living room, and run another signal the outdoor speakers in the backyard as "zone 3". I was shocked when I fed the pre-pro with a 24bit, 96khz signal and as well as a DTS encoded bluray and it played it all perfectly.
pre-pro by Brian Pa June 26, 2014
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Pre-Proposal 

WHY
In a society where Engagement Proposals are heavily pressured for one sex to orchestrate a grand gesturing production to their significant other (S.O), the ‘PRE-PROPOSAL' acts as the antecedent event that can lead a couple to a successful, happy -and fair- relationship long term.

HOW
A Pre-Proposal occurs when one sex (often the female, or one who is expecting to be Proposed to) proclaims their love for their S.O, and also announces that they are primed and ready to receive a future Proposal.

Like it’s proceeding event, the Pre-Proposal CAN be an orchestrated production delivered to the S.O. Once the Pre-Proposal is presented (and accepted!), the receiving party has 365 days to appropriately reciprocate a Proposal.

Here are the following relationship benefits of practicing the Pre-Proposal:

1. One party alerting that their souls are ready for future potential engagement-acceptance.
2. Both parties enjoy the thrill, joy, stress, schemes, awesomeness of both delivering and receiving a pre/proposal plan.
3. Deterrence of unnecessary Proposal costs and/or embarrassment IF couples are not in relationship compatibility
Ie. Lateefa has known all along that she wanted to be married to John. Societal pressures have Lateefa unsure of WHEN and IF John will be proposing to her. Lateefa also feels like John should be shown how much he means to Lateefa. She prepares a moderately well schemed plan as Pre-Proposal to John, and with much success, John was so happy, moved, and proposedly-informed that he Proposed to Lateefa < 365 days later. #love

OMG She finally Pre-Proposed to him! He's got a year now to drum up something special back to her ;)

He/She’s locked up ever since XXX Pre-Proposed to them.

I was surprised at being Pre-Proposed to since I actually never liked XXX. Now we save X amount in time and money.

That Pre-Proposal was an incredible experience. I feel so loved by their gesture and can’t wait to surprise them with a Proposal of my own.
Pre-Proposal by futuretrends August 28, 2019

Pre-Procrastination 

The art of accepting the fact that you will wind up doing a task at the last minute, so an educated decision is made just not to bother with it now and complete the task at the last minute.
Pre-Procrastination:

Person 1: "Are you working on your assignment due next week?"
Person 2: "Nah I've Pre-Procrastinated to just work on it the night before."
Pre-Procrastination by Andy and Sandy September 19, 2012

Pre-procrastinate 

Pre-procrastinate is when you are already planning to procrastinate in the future.

When you finish work on Friday and you plan to not get off the couch until Sunday night. You preprocessed the weekend duties.
Me - Hey bitch wanna go out

You- Na I don’t have any clean clothes.

Me - That’s ok Pre-procrastinate laundry until Sunday and borrow from Susie.

You- Brilliant.

Pre-program that boot to delicious 

1. a statement refering to using high tech equipment, which enables members of foriegn political parties the ability to program booty's to delicious. Thus making those booty's edible by young male travelers.

2. ramblings of madmen

1. "Fuckin Australia here we come!......they better pre-program that boot to delicious"

pre-prov 

Verb. Or Noun. Whatever.

A term used by improvisers (those who perfrom improv/improvisation), to describe the act of improvising material at any time prior to the actual performance (bad), or planning how the performance of improvised material plays out (worse). In either case, pre-prov-ing (pre-provving?) renders the pre-prov-ed (pre-provved?) material un-improvisable, and thus null, void, and unapproachable to any good sport of a good improviser. Improv practice is intentional pre-prov, in order to practice skills and techniques. When just joking around, yes, unintentional pre-prov happens, and though often funny, may present a major bummer to any good sport of a good improviser. Though often adaptable to create quality, finalized, REHEARSED material (i.e., a practiced comedy sketch, a polished song), what is pre-prov-ed/pre-provved can never be performed as true improv (without involving memory loss, that is).

Note: What one performer pre-provs may still be original to another, and still qualify as improv, providing that the second performer did not know of the first's pre-prov bummer.
Y'know those U-shaped neck pillows? They're so funny. Two or three separate times my mom and I have gone into hard-core Object Freeze using them - we must have come up with close to 30 different ideas. But, to me it's such a bummer because now, I know that just about everything I can think up for those U-shaped neck pillows is pre-prov and not true improv.
pre-prov by Yours Truly Benchley October 20, 2008

pre-proffering perusal

A.k.a. "comments checking" --- i.e., da standard-consideration act of first scanning da typed entries dat other viewers have posted regarding a YouTube video or Facebook image before you yourself "state da fairly-obvious" from yer own keyboard, just in case one or more other similarly-observant/studious folks have also realized/opined similar info as you did, and have already mentioned it there; doing so not only saves space by not cluttering it up with multiple comments dat basically say da same thing, but it also saves you the trouble of composing a comment of your own.
Performing a "triple-P" --- i.e., pre-proffering perusal --- does not arbitrarily mean dat you have to forego da heady pleasure of adding a few words of yer own, of course, but it allows you da heads-up regarding what to write so as not to bore/irritate other readers --- i.e., you certainly can indeed be da one to point out something if no other presently-posted comments say it, but if you see a similar observation/opinion already posted, you should instead just perform da "mutually-Doctor-Feelgood" task of posting a "yeah, I was just gonna say that, too" approving acknowledgement on da first person's comment; it both allows you to gleefully voice your own piece and lets da first commenter know dat you agree with and praise his own literary composition.