The wad of hair a woman gets on the back of her head after a long night of fucking. Created by the back and forth motion of gyrations as she lays on her back. Generally visible when she gets up to go to the bathroom to clean herself or go to the kitchen for a glass of water.
Chad: Kiersten, what's that rat's nest in your hair?
Steve: Nice fuck bun, Kiersten.
Kiersten: Shut up, Chad!
by Burtie & Lady Di August 3, 2018
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A really hot super famous Tim Tok superstar who is really hot
And likes roblox and is HAY
Trevor/hot daddy baba buns is such a hot hot daddy he makes me shart.
by Hot super baba June 5, 2022
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Hairstyle. Worn in a bun on top of the head but in a casual fashion. Not messy.....caj. Sachas are best at wearing the caj-bun but others have been known to try....... and fail
Sach you feelin alright babes? Your caj-bun is looking a little uptight. Maybe some sexodone will help?
by Gravemeistergeneral December 10, 2013
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Did you see that dog drop a bum bun on my lawn?
by Hoddess5024 September 1, 2022
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The behind of a Bonobo as animal or, more commonly used, as human (see bonobo).
Guy 1: "Have you seen the ass of that bonobo?!"
Guy 2: "You mean the bonobo buns, don't you?"
Guy 1: "Yeah, my bad."
by Patrick1321 July 9, 2019
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Bun bun girls are amazing hackers who hacked people on Roblox. They are pink and have fry hair. They are little shit buckets.
Luke: bun bun girls are my life’s

Aizen: WHAT UWU IM SCARED HOLD ME IRELAND!!!
Ireland: no your to amog us. Go shag luke.
by BiscuitToesOwO June 6, 2022
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