Phenomena which occurs when a very fat person shoves the lower part of their stomach beneath the waist of their pants creating the appearance of an extra pair of buttocks.
by FergusonTO35 October 21, 2010
Get the butt up frontmug. When a man fucks a girl repeatedly so hard she then throws up in which the man quickly plugs the the hole with his dick. Starting to cum in her mouth he unplugs the hole and she continues throwing up.
by Facesmasher47 July 5, 2016
Get the Butt fuck throw upmug. by Someone that goes to tk💀 March 12, 2019
Get the Shut yo bubble gum dumb dumb lookin butt the freak upmug. When you are particularly stoned as fuck and you try to say "stick up your ass" but instead say "butt up your ass".
Izzy
Izzy
Izzy: "Why do British people talk like, that like they have a butt up their ass. Oh wait, I mean stick up their ass... hehehe"
by Spaghettioslover365 April 7, 2022
Get the Butt up their assmug.