morning bulge; when you wake up and notice that your dick is poking your pants, thus forming a bulge
I don't get embarssed when my mom notices my MB coz its only natural and happens to all teenage boys
by tory borty May 7, 2013
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A short term for Money Boy which is basically similar to Working Girl but it’s a boy
He is a quite famous MB
by The_holy_avocado:)) March 6, 2019
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Haps baps MB and ML= Happy Birthday my brudda/my bredrin , more life!
by MrStealUrDefinitions;) December 18, 2019
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Make-believe.
Fights in real life don't work like they do in movies, it's all MB.
by bitstripslang October 11, 2019
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olivia: omg you're such a slut cassidy
cassidy: ugh you're such an mb
by socksandsandals25 May 8, 2016
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Mage Bank in RuneScape. People say they're mb pk'ing when they are player killing in the wilderness at the mage bank.
OMG! I just owned a noob for whip at mb!
by Gre8est_Sk8r January 7, 2007
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an underage love interest, usually one that's lonely, anti-social, and desprate.
Dood, you call that MB up today?

Nah man, she's total jail bait.

Yeah, but you know she gives it up!!
by dood11 November 25, 2007
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