to huddle together in a confined space; to associate with.
|Bulletin (Sydney) 25 Aug. 12/1: Why don’t yer let them other donahs see – / And all the Push – how much ye’re shook on me? / Why don’t yer mug and let the crawlers know – / Why don’t yer squeeze?|
|Long Trick 85: ‘Mug up, and let’s get ’appy and chatty.’ They crowded together [...] for warmth.|
|Really the Blues 94: A musician friend of mine [...] had to mugg with a lot of hophead gangsters who roomed near him.|