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2.
Giving threatening looks to another person meant to evoke fear of an imminent attack
The rival gang member was madmugging his enemy, by glaring at him in a threatening way meant to evoke fear.
by Publiusj March 12, 2012
 
1.
When you have an angry scowl on your face during a dance off. Or, an overly serious expression while preforming some interpretive dance
Molly had a blast mad mugging with her girls to Bel Biv Devoe.
by Mad Maxie September 11, 2013