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1. A large women who likes to be ejaculated on.
2. A large whale who likes to be ejaculated on.
Pete: Why did you go home with that large women?
Mully: Dude, she is a sperm whale.
Pete: Oh. Then kudos to you.
by Bernard Bangwanger September 24, 2011
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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A whale who recently had sex and is currently completely filled with sperm from the other whale.
Look mommy, there's a sperm whale over there.
by Soptactic January 23, 2015
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The process of making your partner laugh immediately after a blow job so that your sperm shoots out their nose.
"Me and that bitch were watchin step brothers while she was giving me a bj and she totally spermwhaled all over when I was finished"
by Scuba Sam February 26, 2009
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A fat slut, somone with a loose snatch! see also; Sperm bank
that gemma has slept had more prick then an antique dart board! shes a proper sperm whale!
by BrettR October 02, 2005
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Sperm Whales are a bunch of whales that have sex in the ocean. When the whale gets horny it produces gallons of sperm that mixes with the ocean water.

Sperm Whales are the horniest whale species known to man.
Mom: Don't look honey.. those are two whales having sex
Dad : Those are called Sperm Whales *jerks off*
Child: Woah! whats thats white stuff!

Why is the ocean water so salty?.. Probably because of them Sperm Whales
by ilovespermwhaleslmao February 13, 2010
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A large female who hangs out at bars and night clubs looking to take a drunk male home and get inseminated.
Joe went home with sally that sperm whale last night shes a real whore, she definitely was trying to get knocked up so he would be stuck with her for good.
by biggirl823 March 05, 2011
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