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1.
The state of being moo-like. One being good, the other being bad.
Good: "Thats moo-ish.."
Bad: "Thats really freaking moo-ish..."
by Brock June 29, 2004
 
2.
"moo" meaning screwing"
"ish" meaning stuff

Screwing-stuff
your mom is very Mooish.
by Species June 30, 2004