When a woman's weight is disproportionatly shifted towards the rear, possibly due to eating hamburgers with secret sauce.
by 103939393 November 11, 2015

A: Let's eat senpai!!
B: Lol! You are such a dumb bun. You forgot the comma.
A: *evil grin
B: (anxiously) You forgot to put the comma right??
B: Lol! You are such a dumb bun. You forgot the comma.
A: *evil grin
B: (anxiously) You forgot to put the comma right??
by plskillme_already August 15, 2022

by DarthPlasma January 26, 2018

Bun Bun Girls is a group of childish and cringe ROBLOX hackers. In order to know if you have encountered a Bun Bun Girl member, they will have the word "bun" in their username. You can easily avoid them just by not adding anyone with the word "bun" in the name. Even ROBLOX has taken concern into the matter and no normal person can have the username with the word "bun" in it. The Bun Bun Girls have a victim list of Youtubers. However, despite being a hacker who can completely ruin one of the games in ROBLOX, they are quite childish for one. For example, whenever somebody calls their group cringe, they get mad and try to hack that person. Youtubers includeing Kreekcraft have ending up calling these hackers fake!They first appeared in 2021 but as of 2023 they are are returning
by Booms1234 March 20, 2023

by Eoin764 February 24, 2021

by Sksksksksk90 December 3, 2020

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!
Steve: Nice fuck bun, Kiersten.
Kiersten: Shut up, Chad!
by Burtie & Lady Di August 3, 2018
