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The process of engaging in material which one finds sexually titivating, before a night out, in order to increase your chances of being sexually proficient by way of boosting your sexual desire.
Hey Larry, why is there a copy of Underwear Bimonthly on your bed?

Well Charles, I thought a slight bit of "pregash" was in order before our night on the tiles.

This is why I love you Larry.
Pregash by Villmot March 20, 2011
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prelashing 

(VERB) To consume alcohol, generally a large amount, at one's own place of residence or that of a friend, as a precursor to going out to a party, bar or club. Also 'prelash'(NOUN). Can be practised alone or in groups. Often performed at the same time as getting changed, putting on make up or straightening hair. Favourite pastime of students. Can involve drinking games such as 'Ring of Fire.' Generally considered to be a cheap, convenient alternative to drinking in bars before clubs open.
'Are we prelashing at Dave's tonight or just going straight to the bar?'

prelashing by madameW January 22, 2008
Related Words

pregasaurus 

1: A pregasaurus is a pregnant woman that that will destroy anything thats in the way of her and her food.

2: a pregnant lady that will eat anything, its a omnivore (eats plants and meat)
1; Quick everybody hide there's a pregasaurus coming and shes on a war path.

2; jason: hey man who's chocolate is this

brett: i wouldn't touch that it belongs to a pregasaurus

jason: oh shit that was close man that could have been my

last meal

brett: yeah man them pregasurus are vicious creatures
pregasaurus by pregasurus hunter October 12, 2011
The liquid that exerts a males penis before he ejaculates.
Dude1- "She was giving me an old fashion then she stopped all of a sudden."

Dude2- "dude why?"

Dude3- "She thought my pregasm was cum..."
Pregasm by Dr.ano January 9, 2011
A way to say thanks i.e. "show appreciation"
"Hey nigga pass me those clippers...Preash"
Preash by Tone Capps April 22, 2006

prefashionable 

To be ahead of the curve in style, attitude and general social prowess. To be the originator of trends and the definer of the next fad.
-"Those have have got to be the most retarded sunglasses i've ever seen!"

+"Actually these are the coolest shit around, you just don't know it. I'm prefashionable."

-"Oh...where did you get em?"
prefashionable by Oso D'lyshus March 18, 2008
Short for "I appreciate it". Pronounced "preesh", like the middle of "aPPRECiate".
"I got you another beer."
"Presash!"

"Preash for getting the printouts."
preash by Mike Blaszczak May 29, 2005