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1.
This was originally derived from "fish" meaning snot, one day someone felt it was necessary to be random, and said NAH FISH!

This has since became a way of saying "nah, go fuck yourself"
"Give my pencil back!"
"nah fish!"
by P.Bansal March 20, 2008
16 5
 
2.
it means no. but much cooler.
"Hey do you wanna go visit my mom in the hospital? She's dying of cancer."
"Nah fish, I gotta play pokemon and smoke a bowl."
by lauren mcgrath July 27, 2007
11 17
 
3.
Saying no, in a cool way.
"Hey do you like ghost13132?"
"Nah fish he's gay"
by its from January 15, 2008
2 11
 
4.
Saying no, in a cool way.
"Hey do you like ghost13132?"
"Nah fish he's gay"
by its from January 15, 2008
2 13
 
5.

surfer\stoner slang meaning no. used in south and north
california coast. used mostly by stoners back in the day
''hey brah wanna go visit my mom,shes sick''
''nah fish, I have to go smoke a bowl and play x box''
by ghost13132 December 31, 2007
2 24