An onomatopoeia often used in manga for when someone with large breasts walks up to (or past) a male character.
In "Higurashi: When They Cry" vol. 1, page 41, the sound effect is portrayed when Mion walks past the main character.

Busty character walks by "badum".
by Stiffofdeth June 6, 2009
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A lugubrious hunter and founder of a relative tribe known as TLM that consists of Animalias that are very cozzy to those they fuck with.
Yooo yalll badum yes the founder of tlm
by _.badum._ January 29, 2020
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The word badum means to be a complete and total idiot and retard. It is a combination of Dumb, Bum and Duh.
Lots of people have been recently using the word refering to the patients in a crack house..
1)Dude! Look at him, he can hardly stand up straight! He is either drunk or badum!
2)Guy 1: what is 2 +3 equal to?
guy 2: is that a trick question?
Guy 1: uh, you are the definition of the word badum..
by gamer13 - Hans Sperling September 22, 2006
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n. 1) see Rimshot. 2) The sound made from a Rimshot. 3) A sarcastic remark in place of feigned laughter.
Person 1: Why did the chicken cross the road? To get to the other side! Get it? Get it?
Person 2: Badum-ching!
by d_art February 5, 2006
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that sound after someone makes a corny joke
two drum sounds and a cymbal
Why'd the cookie go the hospital?
Because he was feeling crumby!

badum tish
by walrus42 October 19, 2008
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Usually heard after making a bad or corny joke

Also it’s badum-tss not badum-tsh
So a man walks into a bar and says “ow

*Badum-tss*

*Laugh track*
by NahKnee August 20, 2019
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It's an onomatopeia for a drum technique normally accompanying the conclusion of a cheesy joke or a comedy pratfall (where someone is made to look like an idiot by their own devising - such as falling on a banana skin they earlier discarded). It consists of two fast rimshots and a splash cymbal - producing the sound "badum tish".
#1: What does bees do if they don't want to drive?
#2: Dunno
#1: Wait at the buzz stop! Haha!
#2: Badum tish!
by Mats Valen April 24, 2007
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