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A late night bet preformed in a college dorm room where one male sticks his tongue briefly in another male's butt crack for the sum of $65.00
That was crazier than the time your roommate gave a yum yum!
by Buck Nasty Athlectics September 4, 2007
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A yummy way to agree with something, or to acknowledge someone.
Josh: "can I bum a cig?"
Phil: "yum yum"
by PsychoWhiteHoe June 7, 2018
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When a guy jizz in your mouth and you pass round the cum equally between your fellow colleagues in the room so everyone has a bit of protein before the big night on the town
Patricia: shall we yum yum this jizz in my mouth

Justine: yes okay

Jeff: yes I'm hungry before the night out. Please save me a piece
by Sauly bee July 8, 2020
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When you invest in a company and some good news comes out about it, or you make a a lot of money from your position.
"Golden State Warriors is up 367%... yum yum!" - Chamath Palihapitiya (part-owner of Golden State Warriors)
by speakerr January 31, 2022
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A Yum Yum is a sexual act, of when two males stick their fingers in each others rectums & then proceed to sniff their own finger whilst masturbating
Rob: Come here Jonathan you minx, I'm going to give you a right naughty Yum Yum

Jonathan: I can't wait to smell my poo finger, whilst pulling my todger off
by Yum yum king May 7, 2022
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Yum yum is used for when you’re excited or happy about something 🤭
by anonymous May 14, 2022
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Another form of the word yumyums

Hot Asian girls
I hooked up with a yum-yum last night. That Asian girl blew my mind.
by Marcus Bunny August 5, 2008
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