biscuits are undoubtably filling, but when used with the word "fucked" we are relating the state of being full with two sexual acts, creampies and swallowing
For Example:

waking up drunk from a party
"i don't know what the hell happened last night but i know i got biscuit fucked"

"that bitch straight up got biscuit fucked by ________, u know that hoe's pregnant"
by 420Tuesdays August 16, 2011
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A girl who is so good to fuck you don't even care if she makes you pancakes in the morning.
"Hey man, did you have breakfast this morning?"
"Nah. I had all I could handle with my little fuck biscuit last night."
by Graham nation June 29, 2013
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A term relavant to that of hell. It is used to describe a state of unhappiness. It is mostly used as a simily to describe a form of discomfort.
Dude, its hot as fuck biscuits out here.
by phonermanon June 13, 2010
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like okay a fuck biscuit is when you knock a ho up and like you accidently left i little fuck biscuit in her
"dude i guess i didnt use a rubber,
HAHA dude you have a fuck biscuit in her,
yea dude i knocked the ho up"
by julian_boredom December 25, 2007
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A fuck biscuit is something you call your friends who are dumb and outright idiots used as a slur in heated arguments
by Daddy1246 August 9, 2021
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An negative expression used to communicate extreme irritation or anger.
I’ve forgotten my keys? oh fuckety fuck biscuits, i can’t take this anymore.
by snaxaphone July 30, 2023
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