Used to refer in a playful way to someone that has little to no buttock definition. The word comes from the struggle of trying to work out the glutes and still being unable to reach the desired fullness or definition.
by Mackmar134 February 1, 2019
Get the struggle bunsmug. The Classic soft shit tortilla wanna be taco shell. Not good at all for eating however can hole enough taco meat for a heart attack.
by C:h1@d July 2, 2017
Get the Taco bunmug. Luke: Did you see Paul's Mum?
Dave: Yeah, she was totally free-bunning man. I could see it winking at me..
Luke: You would, wouldn't you?
Dave: Would what?
Luke: Throw your old-chap in her.
Dave: ... yes.
Dave: Yeah, she was totally free-bunning man. I could see it winking at me..
Luke: You would, wouldn't you?
Dave: Would what?
Luke: Throw your old-chap in her.
Dave: ... yes.
by Lukeus Kellyus January 20, 2009
Get the free-bunningmug. 
by Indian Hufflepuff October 13, 2016
Get the Bun Mamamug. 
by Yours truly 😗✌️🏽 August 9, 2019
Get the BUNmug.