rancid ass 

A condition which a person exhibits when they don't wash their ass for weeks.The smell resembles that of mortified flesh such as gangrene or road kill. Very common phenomenon at TA truckstops.

"Yo ... I had to drop a deuce in the restroom at that last truckstop ... All I gots to say is that the man sittin' in the next stall had WHACK rancid ass ... and the MAN who don't EVER wash his ASS is a MOTHERFUCKER !!!"

rancid ass by Mad Honky August 15, 2014

rancid ass farts 

Farts of a pungent and tangy aroma, usally can be smelt after consumption of various meats, cakes, savouries, carbs and sweets.

Dubliss: *sniff*

Mon: hmmm take it in boy, i got me some rancid ass farts !
Rallis: woooooweee thats some rooti tootin rancid ass farts !

rancid ass farts by Rallisman November 22, 2016

Rancid Ass Syndrome (RAS) 

extreme gas thats smell is so unbearable it will clear out a room. It is so awful it has the strength to penatrate through layers of blankets, even comforters and make your partner want to vomit. It is so potent that it even smells horrid to the fartee themselves

My Rancid Ass Syndrome (RAS) was so bad that it woke my boyfriend from his sleep and he had to leave the room because he was dry heaving.

Rancid Ass Syndrome (RAS) by mr hanky June 12, 2007

rancid goose ass 

Describes a particularly rancid ass that belongs to a goose.

Me: "You smell like rancid goose ass"

rancid goose ass by Nikkikins December 16, 2004