A competition amongst of a group males where one male announces "Shaker Showdown!" and all other males begin to masturbate ferociously. The winner of the showdown is whoever ejaculates the fastest.
Sitting around the dinner table: "Alright boys, Shaker Showdown!!"

by #1 Shaker April 5, 2008
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An ancient and sacred ritual performed by two males for control of the tribe, or for fun in New York. It involves insertion of a large wooden chopstick exactly halfway down the urethra of the first contender. Next, the challenger inserts the remaining 1/2 into his own penis. From there, both men masturbate until one has shot the chopstick completely down the other's p-hole. Traditionally, the victor defecates on the losers chest.
Bill wanted to watch The Simpsons, but Haansehm wanted to watch House, so they had a Cambodian Showdown.
by Joey Orgler October 21, 2007
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When a southern gentleman stares at a woman or man's asshole without blinking while they forcefully shit on their face.
dude last night was so crazy, me and jasmine did a Texas Showdown
by YUNGNUTSACK September 11, 2020
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A confrontation between two or more parties in which victory is achieved by killing the other party or parties.
Did you hear about Billy? He died in an Italian Showdown last night.

My father has several knife scars from an Italian Showdown he almost lost a few years ago.
by Mr. Fly White Guy December 13, 2017
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A variation of the Seattle Slapjack. Two masturbate facing each other. Upon ejaculation rub the semen into your palm and slap the other person across the face. The first person to slap the other wins.
Guy 1: Hey you trying to get in a Seattle Showdown?
Guy 2: Not right now my girlfriend is coming over.
Guy 1: Dude you're not doing anything else.
Guy 2: Fuck it. Your place or mine.
by suckittrebeck4 April 1, 2012
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The fistfights that occur only after at least one person takes off their shirt to show their muscles and look tough. fight, fistfight, brawl, beatdown, street fight, punch, box, throw hands, Worldstar
Two MMA wannabes got into a shirtless showdown in the parking lot and managed to knock each other out.
by joecoolthefool December 19, 2016
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when you are in a public bathroom stall and someone is in the stall next to you and you both have to pee, but you are both afraid of the judgement you might receive if you start first.
**texting**
Girl: hey, i'm in the bathroom, i'm gonna be late for class but i'm having a pee showdown with the girl next to me
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