Define Blowback Meaning

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'

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 act of exhaling cigarette smoke into the mouth of another person. Often leads to a hook up.

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.

when you're squeezing out a fudge dragon and the splashing water hits your fart box.

1. The expulsion of anal pear and accompanying detritus during gargantuan anal orgasm.

the substance that splashes back onto your ass when you take an explosive shit.

When you have to hold in a fart due to being in a public or enclosed space (airplane, subway, car) and the fart rumbles back up into your plumbing. Over the course of several hours, a serious queue of un-expelled farts will build up, prompting an extended cropdusting at the earliest convenience.

When your cumshot hits your own face.

when semen is swilled in the mouth of the recipient, then passed back to the producer of the semen, via oral exchange.