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When a woman's shoulder blades are squeezed together, making a canal that is then fucked.
That girl was awesome, she let me backfuck her.
by Wordpioneer October 10, 2014
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
The act of being fucked over by someone that is seemingly pleasant and kind-so pleasant and kind in fact that you feel comfortable enough to get backfucked.
by baronvonrick April 09, 2020
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3
Having sex with an obese person by thrusting one's penis between folds of their back fat (the back being the most unfuckable part of the human body).
Hey dude what'd you do last night with the fat chick from that party?

I totally backfucked her, fuckin' insane.
by HimInMeDickIt December 06, 2009
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