Define Snap Back Meaning

An old school adjustable hat with those snap buttons in the back

when people want you to respond to there snapchat story. the same as someone putting talk on there story.

A girl that is tight, has a kid and stays/becomes tight again.

What happens when a guy tries to pull of a girls thong but ends up snapping it, leaving a really painful mark on the girls ass.

When your penis bends to incredible lengths before inevitably breaking and returning to it's neutral position, mangled and distorted. The name is given due to the snapping noise the penis makes as the muscles tear.

The capacity of your anal sphincter to contract back to normal size after something is inserted and removed from it.

The most useless creation known to man. The brim is too small to protect you from the Sun and a lot people wear it backwards therefore rendering it completely useless. The Snap Back is commonly associated with pussies,swag fags, and wannabe Gangstas. Snap Back wearers are kids who think they are cool for wearing tight skinny jeans, ugly sweaters or t-shirts that say YOLO SWAG or OBEY and overly bright ugly shoes that match with their Snap Backs as well as being completely pathetic losers who are overly sensitive and soft. Snap Backs come in many stupid designs, some have the words "OBEY" on them, a retarded logo that swag fags have adopted, other snap backs have college or sports teams on them usually worn by posers and douche bags who have no affiliation with the college nor are going there and for the one's who wear the sports themed snap backs they aren't even fans of the team and just wear it to look cool when in the reality they look like massive a chode.

Snap backs have a hideous characteristic look, the brim is incompetently stupid. It is completely straight and looks ridiculously inept, it fails to protect the eyes from the son which is what hats are designed for, it also has characteristic Velcro strap on the back that makes it look even stupider and anyone who wears it look retarded. This hat is the dumbest thing ever invented, stick to fitted hats for the love of God. And if anyone past the age of 5 wears it they should be deeply ashamed to call themselves humans.

to Gape ones asshole, and insert your balls, not penis, and let go of the ass and let it snap back on the nut-sack, and then projectile vomit on the girls vagina

When someone is using the urinal and you pull them away momentarily then let go;sending them almost face first in the struggle to get back.

It means "to go back to reality". Where none of ur fav anime waifus exist.
Also it is a meme that came from the song "Lose Yourself" by Eminem.