mugging
n.— «Before examining Nico’s psychosis though, I had to get myself psyched. On my way there, I listened to Tupac so that by the time I arrived, I was mugging (mugging- to look hard-core. Etymological root: “mug shot”).» —“Paintball: Where the savage can be savage” by Hector Leano in UCLA Daily Bruin (L.A.) May 4, 2005. (source: Double-Tongued Dictionary)