a wrong way to describe giving a handjob... will result in your dick getting slapped right on the head... causing you to cry
guy: 'how bout a handjob?'
girl: 'i dunno, how do you do it?'
guy: *unzips his pants* just take it in your hand and act like its a ketchup bottle
girl: ketchup? *grabs hold of wang*
guy: *nods*
girl: *wails on his junk*
guy: *cries really loud*
guy: fuck using the ketchup effect!
by captainooga October 21, 2006
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The Ketchup Effect is used as a saying when you squeeze the ketchup bottle but can't get anything out, but all of a sudden your whole meat gets soaked in ketchup. It can also be used in other situations.
Dad: So how did the game go last night coach?
Coach: We kept on puching for the whole first quarter, but couldn't get anything to drop, but then in the second quarter we scored on every single play!
Dad: Wow, must have been the ketchup effect.
by NorwegianMagician69 October 22, 2018
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The event where if a food uses too much ketchup and someone considers it good, it is because they like the taste of ketchup and not the overall dish. This can also apply with other condiments like hot sauce.
The following meatloaf has been affected by the ketchup effect.
Dude 1: "Dang dude, this meatloaf is so good!"

Dude 2: "The hell are you talking about? This shit tastes like ketchup."
by BROOMROOMMAN November 10, 2020
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