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Northern english Slang.

To be disreputable/shady/a thief
I wouldnt marry him pet, hes micey.....
by Geordieboi1990 May 27, 2009
Micey is often used to describe an atmosphere, attitude or situation as rough or aggressive.
It was very micey in the club last night. You could tell there was going to be trouble.
by AdamSvegas March 24, 2007
to be stingy with something, i.e a mouse's portion
"don't be so micey with the weed this time!"
by betty rossetti February 18, 2004