Noun. An aggravated or angry facial expression.

A prolonged, directed mean mug is often enough either start or avoid physical altercation.

Verb. To maintain an angry facial expression.

ref: www.meanestmug.com
Three 6 Mafia use mean mug adjectively: Mean mug niggas lookin and they hid from a smile...

Baby Bash uses mean mug as a noun: Y'all know whats up / Look on my face and its called the mean mug.

Xzibit (feat. Keri Hilson) as a verb: All the girls mean muggin / cuz they musta seen what a girl pulled up in
by Oldboi February 02, 2010
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to give someone the evil eye and to stair them down.
that dude who was talkin shit, i mean mugged him and he didn't do shit.
by n/a December 11, 2003
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mean mug: it is when you intensely stare someone down for a long-shorrt amount of time with your car window slightly rolled dowwn as if you are a black man hunting for a bucket of chicken or a house to rob but you are staring at a person
i walked down the street and this old lady was mean mugging me

dayummmmn dude
ikr
mean mug da bitch back!
by apossumlovingsonofabitch September 26, 2011
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The sexual act during which the provider of oral stimulation momentarily removes the penis from her/his mouth to glare at it as though they are angry at, or absolutely loathe said penis. The stare down is completed when she/he spits on the penis and continues the fellatio in a vigorous manner.
"hey bobby, check out this hot blowjob scene. I love it when she mean mugs that stud's cock"
by Ray Bob February 19, 2005
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When someone gives you a dirty look they are mean mugging you.
Everytime I see that bitch she's always mean mugging me.
by HydroGrrl December 13, 2004
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