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.
Man, after Jenny had her baby she developed some major butt up front.
by FergusonTO35 October 19, 2010
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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.
Hoe: you need someone tonight
Guy:can I make you butt fuck throw up
How:sure
by Facesmasher47 March 28, 2016
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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: "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 8, 2022
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