Verb. Refers the action slapping the thumb-side of one's clenched fist into the open palm of one's other hand, mimicking the action of attempting to extract ketchup that is stuck within a glass bottle. This action produces a slapping sound that is meant to imitate the sound produced by the contact of flesh between two people committing vigorous sexual intercourse or similar act. In more rare cases it can refer to solo masturbation.
Example 1.)

Person 1: Where did Dan and Molly go?

Person 2: I don't know (makes ketchup bottle motion).

Example 2.)

Person 1: Where did Dan and Molly go?

Person 2: I don't know, ketchup bottle (motion may or may not be made while saying this).

Example 3) (masturbation)

Person 1: Where did Dan go?

Person 2: I don't know, (insert text from examples 1 or 2)
by Abe Rego October 30, 2009
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In giving a hand job, when someone has one hand around your penis while their other hand is smacking your pecker head like beating a ketchup bottle when pouring.
"She was beating my dick off last night and then did the ketchup bottle move before I finished!"
by D. Bittick June 14, 2007
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verb. 1. to have one's penish smashed with the palm of his unexperienced girlfried's hand during a handjob.
2. to have one's dick smashed as if it was a ketchup bottle.
1. That dude can't walk cuz his dick got ketchup bottled last night.
2. "Damn girl, why did you have to ketchup bottle me.... that really hurt bad, now my dick is bleeding."
by JandE July 11, 2008
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Usually when a girl is on her Period to make it funnier they’ll refer to a Ketchup Bottle.
Female 1: I’m a ketchup bottle😭
Male 1: I’ll help you feel better💙
by Mosthated.ice March 22, 2020
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When you are having anal with a girl you jam your dick all the way into her ass. Then say "Oh no its stuck!" Then you slap her ass and pull real fast and tell her "Sometimes you just gotta give it a little tap"
Guy 1 "yo nigga I gave my girl the ketchup bottle last night it was off the chain"
guy 2 "I told you to stop calling me a nigger"
Guy 1 "yo mah bad slavery was wack"
by Crouching tiger hidden nigger September 23, 2009
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When you pound a girl in the ass so hard that she starts bleeding, and then you pull out the just as she is about to fart. It makes a sound like a near empty ketchup bottle.
This manuever is very rare.
Todd gave sara a ketchup bottle last night.
by Rodney Fallington November 13, 2006
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Shaking the ketchup bottle is a euphemism for male masturbation. The metaphor comes from both the vigorous shaking motion applied to a ketchup bottle, and the "splooging" of ketchup when you've shaken it for long enough. Note: If what comes out is actually ketchup coloured, then you should very likely consult a doctor.
BRB - need to shake the ketchup bottle.

I was vigorously shaking the ketchup bottle last night.

I think I spent too long shaking the ketchup bottle - I'd ran out of ketchup by the time I was finished.

Shaking the ketchup bottle is a great way to pass the time.
by orangepony April 12, 2012
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