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A combination of a snake and fish. Having the body of a fish, and head and neck of a snake. Also a slang term for vagina.
Dude I got so much snish last night.

I eat a lot of snish.
by Brreed February 11, 2009
To snish-a verb that can be used to replace any verb

Eg; I am just snishing to the shop

. are you gonna snish that burger?
Shall we snish that new tv show?
by happyswirlys May 29, 2012