1. When someone falls asleep with their head tilted back, mouth slightly opened and lips still closed.
2.When someone is sleeping and think that their piers are making fun of them, they put a sour face on. also know as an Ugg Mug
"Man look at that she kind of has a ugg mug on!!"
To steal a girl's $200 boots.
"Like, oh my god! I just got Ugg mugged! I can't find them anywhere!"