DPF 

Diesel Particulate Filter

The purpose of a DPF is to filter out particulate matter (a.k.a. black smoke) from a Diesel engine's exhaust, which consists of two distinct components, soot and ash. Soot is elemental carbon, which is the visible black stuff you see, and soot is the result of unburned fuel. Ash, on the other hand, consists of non-combustible metallic salts and is formed because engine oil contains many magnesium, calcium, and zinc compounds, and small amounts of oil are inevitably going to be burned along with the fuel.

A DPF is typically a big muffler with a ceramic honeycomb inside it that catches all this soot and ash and holds on to it. It doesn't let it out the tailpipe. It works well. But the problem is, it's a FILTER, and over time it's gonna get plugged. And once it's plugged up you now have an exhaust restriction, which is bad for your engine. It reduces your power, and you get all sorts of other problems. So how do you get the DPF to be clean again?

Many engines now have regeneration systems that spray fuel into the exhaust and blow air into it, then they light this fuel on fire so that the DPF can be heated to around 600°C in order for the soot be turned into carbon dioxide. This clears out the soot. Ash, on the other hand, is non-combustible and builds up in the DPF over time. Even during regeneration ash remains in the DPF and at some point you will have to wash the thing out or have it professionally cleaned in order to get rid of it.

From the year 2007 onwards basically all heavy-duty Diesel engines had to get a DPF in order to reduce particulate matter emissions, which lead to Diesel engine manufacturers ramping production up significantly in 2005 and 2006 so they could continue selling pre-DPF engines well into 2007.

DPF by The_Anonymouse June 23, 2021

DPF 

Dick-Proof Factor; A numerical indicator of a woman's tendancy to resist sexual advances.

Don't bother talking to that girl over there dude, she's at least DPF 75.

DPF by r0xtarninjaman August 8, 2009

DPF 

Dinner Party Faggot - a homosexual male, typically urban, sophisticated, and at least middle aged, who is on the dinner party circuit with other gay guys, and fag hags, where marveling over the dishes and the recipes is the norm. Probably can be done pot luck style, or by taking turns hosting.

"Oh man, there's this flamboyant DPF who works with me. He is always talking about the dinner parties he and his friends hold."

"Yeah, and someone would probably be rich if they had a dollar for every time someone said fabulous or festive about the different courses."

DPF by highlyopinionated May 16, 2013

DPF 

Dollars-Per-Fuck - A statistical measure of how much effort in dollars that a male invests into a woman per actual fuck. DPF is generally a fixed cost proposition with a prostitute but a DPF can be calculated in every sexual relationship including marriage where DPF can sky rocket if there's little to no sex. A $0 DPF would be a girl in which you invest no money in who simply wants to fuck you. Attractive guys, college guys, and guys with good game are likely to have lower DPF's than less attractive guys and older guys such as a sugar daddy. Gold digging girls can significantly raise your DPF as they are looking to extract the most they can in cash and gifts from the male.

I've taken this chick out on 5 dates and spent about $500 on her and only got to have sex with her once. My DPF on her is way too high if she doesn't start putting out more soon.

DPF by SonnyATX December 2, 2013

DPF 

When you skip getting a free ride down to DC with your good friends so you can get paid double the amount for one days work, but then immediately spend more than half of it to catch a bus down to see them.

True Man - yo we’re leaving at 5pm sharp Friday.
Nervous idiot - nah I can’t, it’s DPF *claps hands together and rubs them* I’ll catch a bus down there Saturday to inconvenience all of you for having to wait for me.

DPF by Caveyesesese July 14, 2018

DPF 

The fork that is designated as a pickle fork in which you use to pick up the pickles with it.

Ayo bru pass me that DPF.
Ight Bru I gotchu
*passes pickle fork*

DPF by Reanna/queen December 10, 2020

DPF (douchy penisface) 

n. slang. --abbreviation for the term 'douchy penisface'. Originating from the Western New York area, the Douchy Penisface is an insult to be flung at only the dirtiest, low-down people you would happen to know. By calling someone a DPF, you are insinuating that a penis is growing out of their face usu. the nose area.

Like giving someone the middle finger, the DPF also has a gesture. To do this, you put your finger to your nose, and wiggle it around. This is the most common form of the DPF.

In case you incapable of using the finger, you can put any other object up to your nose. In this case, however, it would not be a DPF, but a variation of it. To correctly name this variation, you would say DP and then insert the first letter of the object you are holding to your nose, and then add the F for 'face' at the end. For example: if you were to hold a violin to your nose, it would be a douchy penis violin face, or a DPVF, for cheese it would be douchy penis cheese face--DPCF, and so on and so forth.

While all of these variations of the DPF are strong and unique to each person that does it, the strongest thing you could do to express the DPF is to sit down and hold your knee to your nose. This is the original, most offensive DPF and is known as the greatest insult to mankind. To further this, one could do a 'double DPF', which is done by holding both knees up to the nose while sitting, and kicking the feet around.

In short, the DPF is a versatile and unique insult to whoever uses it and to whoever it is used against.

"Wow, that whore gave my brother genital herpes! What a DPF (douchy penisface)!"

DPF (douchy penisface) by Anonymous Western New Yorker! December 3, 2005