air brakes 

sound, a PSSHHH, type of sound that is similar to a trucks air brakes. The meaning can be two fold, 1st this sound is performed when you are in strong disagrement with a person or with something they might have said. and the 2nd would be performed to say "fuck you" to someone without them really knowing. If they knew you were telling them "fuck you" they would donkey punch you in the head

girlfriend: tom ! all you want to do is drink beer with your friends,or fuck and watch porn. i can't stand it anymore ! !
Tom:PSSHHH ! i'm so sorry, i didn't know it bothered you so much. i'll stop , i want to make you happy

Doe: Fall out boy is the best band in the world ! !
Cloe: PSSHHH, umm, i know they rock !

Dad: Mike ! go in that room and clean it up ! it looks like a pig stye in there ! !
Mike: PSSHHH , no problem dad right away
Dad: HEY ! ! don't kick me air brakes ! do that shit again and i'll donkey punch you in the head ! !
Mike: Ummmmm, yes sir

air brakes by Jack de wack June 12, 2008

Tennessee air brakes 

(Traditional) Large, floppy, low-hanging mudflaps on a semi/large truck that create a lot of wind resistance, on the irrational premise that they slow the truck down along with the standard air brakes on large trucks. Tennessee reference due to the majority of truckers being some degree of white male with a propensity for camouflage clothing and stickers like “USA Love It or Leave It.”

(Modern) Large, floppy, low-hanging pussy lips that might otherwise be referred to as ‘mudflaps’.

Wow, that semi’s mudflaps are big and flapping like crazy.

Yep... them’s some Tennessee air brakes raught there.

Dude... did you see Jolene from high school is dancing at the new strip club?
I did, but since having four kids she has some serious Tennessee air brake.

Tennessee air brakes by Runmikeyrun December 23, 2020

German Airbrake 

An act of recto-genital titilation between two consenting parties involving a phallus and a rectum in a manner which some would consider surprising.
The receiver instigates said titilation by placing one's foreskin over the partner's rectum, with the intention of creating an airtight seal over said rectum. Once in position and presumably on a predetermined signal, the deliverer unleashes gas from one's rectum into the space sealed within one's foreskin. Thus, titilation is achieved and the airbrake is a success.

Rosemary: "Wouldst thou consider a delicacy from the Orient followed by an act of carnal recreation only hitherto experienced in Paris? Namely one up the Khyber?"

Reginald: "That sort of act may be unwise, I have heard foul tales of such diet on the gastric channel. Perhaps, perchance, we may suffice with a German Airbrake whilst one peruses the Times?"

German Airbrake by He What Makes Words December 5, 2022