When you tickle a person behind the knee with your foot: Used to induce an orgasim. Not a 100% guaranteed.
"Hey, today in business class. I gave my friend a seahorse."

"Really?"

"Yeah, but he didn't come"

"Shame..."
by SSeahorse January 14, 2012
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Injecting large amounts of tadpoles up a mans ass until they explode out of his anus. Very similar to the way a male seahorse gives birth to its young.
"I asked him if he wanted to try seahorsing and he looked at me like I was some kind of freak!"
by fistymcbeefpunch January 18, 2014
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A Penis and a vagina at the same time
*Nick you are a seahorse
*Because we don't want to be a seahorse
by Sunflower sunhat December 1, 2016
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While having intercourse in a bathroom, you do a girl from behind and give her a swirly at the same time while making horse noises.
I just pulled The Seahorse on Becky in the bar last night
by Aeden Kirin October 15, 2014
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Transphobic phrase used by right wing to describe pregnant men
Seahorse pregnant with twins
by Jenny@11 August 20, 2022
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derogatory term for Swedish men because they are given maternity leave when their wife is going to have a baby, so they also stay home to take care of the newborn (like male seahorses that take care of baby seahorses).
That (man's name) is such a fucking seahorse, slacking off from work cause his wife popped out another kid...
by chandeliertree November 21, 2009
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A lesser entity than a bitch or biat. A comparison to the only species in which the male carries the eggs during gestation.
Look at dat seahorse carryin dat hoes bags.
Kiss my ass you fuckin seahorse.
Punk ass seahorse takin shit from that bitch.
by Chris December 2, 2004
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