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Someone who takes your mug in the office and uses it as if it was their own
Darren is using my mug again he is a right muggerfucker
by DrRolf May 24, 2013
someone that is a fuck that mugs you.
jeff mugged sally and i seen it happen so i said wow your really bein a muggerfucker
by E.S.S bitch June 09, 2010