Booty Valve 

The valve of an inner asshole.

some assholes have them, Including the assholes you met in school.

They are useless due to forcing you to spit out shit from your mouth while shitting.

"Whats that?"

"gURRL DAS A BOOTY VALVE"

Booty Valve by fuckyouokbye May 20, 2014

PRV(pressure relief valve) 

A female with extreme low self esteem that satisfies men sexual gratifications by any means. unlike an prostitute she won't except any compensation for her acts.The only reward she gets is when she see and hear the results of her performance.

As a parent the last thing we want is for our daughters to become a PRV(pressure relief valve)

PRV(pressure relief valve) by Nogunsnofrowns July 22, 2014

frabulator valve 

That part of the exhaust manifold system, on older vehicles, known as the heat riser and necessary to aid in fuel evaporation and make the transition from cold to hot idle engine operation efficiently.

The first cold day I cranked the old buggy over it was obvious the frabulator valve was rusted and frozen up as she wouldn't run right and carb touch-up adjustments made no difference.

frabulator valve by Robert 'Bob' Weiss November 23, 2006

nipper valve 

the end of the metabolic line,the organ that propagates a biological full stop.the anus.
the part of you that pulses when you dodge death by inches

dave;ijust nearly got dropped by that huge chav!
jamie;i know!!he was huge,are you ok!
dave;yeah im fine,nipper valve is twitchin a bit though..brrr

nipper valve by myblueshades October 16, 2008

mud valve engineer 

the homosexual equivalent to a gynecologist

"oh Wesley i apear to be stuck in your mud valve!"
"Don't worry bruce, shuffle over and get the yellow pages and find the oncall mud valve engineer"

mud valve engineer by joshy wash November 3, 2008

Rice Valve 

A part on a car, whether good or bad, that chances performance or sound from factory standards. Also any part in need of repair or replacement that makes the car sound bad or look stupid. Examples include a squeaking engine belt, aftermarket exhaust, super or turbo chargers, or any malfunctioning part of a car, like a noisy engine that is worn out.

Also, any time a Honda or other foreign car that somebody revs really hard or tries to floor it, making the car sound loud as hell. After hearing this one would comment on the Rice Valves in the car, even though they don't exist.

Abbreviated as Rvalves.

Dude, did you hear the exhaust on that car? Must have some monster Rice Valves in it!

I floored my car yesterday, I thought the Rive Valves were gonna explode!

Person 1: Man, my A/C belt is squeaking.
Person 2: Sounds like you need to get your Rice Valves replaced.

Rice Valve by Tiger Trainer November 13, 2009

hyphaduphinator valve 

hi-fa-doo-fa-nator. Noun: The most costly thing a mechanic can sell you when your car is in the shop.

My car has been in the shop for a week now and the mechanic said I need a new Hyphaduphinator valve because I had worn out the old one. Good thing though it's only $1500, Next years model is almost twice that.

hyphaduphinator valve by Wyldthing February 4, 2010