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slang term for what's up, that's awesome, sweet,... whatever you want it to be!
Mark: Hey Beaker!
Becky: SHAMU!

Kyle: Check out my new truck, isn't it huge?
Becky: SHAMU!!
Shamu by your mom April 7, 2003
one who consumes much food yet remains completely thin, usually a joking term
We nicknamed her Shamu cause she just ate so much!
shamu by abcorder32 March 27, 2009
A very large turd that is the size of Shamu the whale.
I called the Department of Defense as I launched a shamu into the Potomac!
Shamu by Kraski July 28, 2022
My roommate kris-10, fat fuck
Roommate 1: Did you hear some weird noises last night?
Roommate 2: Yeah it was just Shamu making second dinner.
Shamu by Bonjour5123 May 6, 2024

shamu splash 

When a man ejaculates into a womans pie hole and she proceeds to spray it back into his face as revenge.
Pssshhhhhh - I shamu splashed you bitch!
shamu splash by caitatron June 26, 2009

Shamu Express 

The Shamu Express is when you sneak into Sea World and go into the whale tank. You sedate the whale and then proceed to fuck it in the blowhole.
I was bored at Sea World so I took the Shamu Express.
Shamu Express by Tony Lucianno September 24, 2006