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"
"Mucca 🤙 Mucca 🤙" *hang loose fingers around the neck* 🤙
"ok you're a Mucca Mad Boy, you can surf here"
You do hang loose fingers from left shoulder and right elbow crossing your arms then you uncross both hang loose hands over your heart. Then chant "Mucca Mucca Mucca, Oi Oi Oi"