A fire breathing turtle that somehow always gets his ass kicked by an Italian plumber. He also is sexually obsessed with princess Peach to the point where he'll capture her hundreds of times, even if he knows he'll end up getting an ass whoopin' every time.
Peach: "Why do you always capture me? You know Mario is just gonna kick your ass again like he always does."
Bowser: "Shut up, maybe this time it will be different."
by Dubiks August 25, 2018
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A derogatory term used to lash out at those who dislike the conventional girl-next-door.
Person A: I'm not really a Lindsay Lohan fan-
Person B: I'LL BOWSER YO ASS
by Mario Party April 2, 2007
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n.An individual who blocks or attempts to block another from mating with the object of affection. Origins are the classic Mario video games where the Bowser character would prevent Mario from rescuing and procreating with the Princess.
"Dude, I almost made it with that chick until you told her I had AIDS. You're a total Bowser."
by Bobby Two-tone July 12, 2008
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1) A mario video game villian.

2) A kid in serious need of a shaving, who needs to put down the flannel and stop wearing pajama pants.
Bowser, either you shave off that dirtstache or I'll wax it off. I mean it.
by twat. February 20, 2007
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A term originating in Riverdale, USA to negatively describe someone or something that is uninteresting, annoying or generally unappealing.
"Can you believe Reggie hooked up with Midge again?"
"Ugh, what does she see in him? He is SO bowser."
by Archie Andrews November 15, 2007
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A large fat bald man that drives a small fast car as popularized in the Super Mario Kart gaming series.
Hey Baz, Thats a very nice new mini cooper you have there.

Isnt it a bit small for your fat ass though Bowser ?
by Mallev January 25, 2013
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When one man comes behind another placing a hand in front(but not on) his balls, using the other hand to grab his ass causing him to hump forward. If this works the guy will scoot right into a nutgrab.
The Bowser was done to me me and it felt good.
by Jon Lorden January 26, 2008
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