A slang term for Boulder from popular children's television show "Thomas The Tank Engine"
"Hey, do you watch Thomas The Tank Engine?"
"Nah, that shit's for losers and 4 year olds, except for Big Ass Fucking Boulder, he's cool."
by the tax evasion guy July 21, 2023
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An annoying little cunt that gets on your nerves constantly, much like a younger sibling. A genuinely retarded being that has no fucking intelligence and is better off dead.
This kid John is such an ass fuck, I hope he burns in hell.
by Milflover69-Jen10 October 27, 2019
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Grown-Ass Fuck - Referring to an older person having good or even better sex as they age.

The term was popularized by celebrity Gabrielle Union on Twitter and use of the hashtag #GrownASF, after comments by Sports Media journalists of the age of her NBA star husband Dwyane Wade. Union tweeted: "Now come on home baby, I got somethin' for ya #GrownASF".
When her 30-something husband comes home, she's going to give him a Grown Ass Fuck.
by OG Design April 22, 2018
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You can fuck your gf ass without her complaining without using any protection and can nut on it.

Under no circumstance this should be avoided
Fuck Ass: banana can always be cleaned
by Urdearlove March 27, 2021
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You can fuck your gf ass without her complaining without using any protection and can nut on it.

Under no circumstance this should be avoided
by Urdearlove March 27, 2021
Get the Fuck ass mug.