When poo gets lodged in your body so much that you cannot shit out of your ass and your body gets blocked with poo so much that it feels like your stomach will explode.
by jackyboyblud January 21, 2009
To hold a marijuana joint in ones mouth between the lips with the hot end in the mouth while blowing smoke out of the hole at the other end into someone else's mouth, so as to get a big 'hit'
'Give us a blowback!'
by Anonymous July 01, 2003
By it's original definition, blowback is the backwards escape of unexploded gunpowder when firing a handgun. In diplomatic terms, it is an unpredicted, negative response against a nation in regards to a diplomatic action that country has undertaken.
The United States, through its underhanded dealings with its enemies, has caused blowback many times throughout its history, leading to bad diplomatic relations and hundreds of millions of people dead.
by QueenVee January 05, 2004
Sliding your butt cheeks over an exhaust pipe and having your friend rev the engine. Usually for self pleasure but was used 20 years ago as torture in Guantanamo Bay.
Jimmy: What the hell is that burning smell...?
Andrew: I think its Daquan, him and his brother are blowbacking in his driveway.
Andrew: I think its Daquan, him and his brother are blowbacking in his driveway.
by Lil_Mayo_Boi April 28, 2016
by meinubh July 23, 2012
A method of operation that is used by most automatic firearms. More explicitly, this is the process used to the cycle the breech/bolt assembly (thereby ejecting the spent casing and chambering a fresh round), by either using the recoil force directly caused by the exploding powder charge, or by diverting the expanding gas of the exploding powder charge via a gas tube and piston.
by Anonymous August 10, 2003
Toilet bowl blowback is when you're taking a shit and chunks of shit or liquid diarrhea hits the back of the bowl and under the seat when you lift it
I just had the squirts really really bad it when I lifted up the seat there was blowback all underneath the seat in the back of the toilet
by Johnny-Whiplash February 26, 2016