Top Definition
Friend, matey, brother, partner, Denoting friendship and kinship
"Ai yup mucca"
by *redpoltergeist June 08, 2012
A greasy mustache belonging to young teenage boys who refuse to shave it off. It can also be used as a derogatory term of said teenagers. Originating in one corner of Ireland, it is spreading rapidly at present.
"Hi boys theres mucca coming now, think Kevy P would make you shave that thing mucca"
by Cak123 October 23, 2015

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