Verb: To pull a "mushy".
They had to mushy out of the party.
Overly crowded, hot, humid, sweaty, uncomfortable rubbing against people. Often used to describe social events including but not limited to: clubs, bars, partys, the gym, etc.
Nick: "Nah, I hear its mushy tonight, lets head to Absinthe and dance"
Dude, you're the mushiest guy around.
Mushy, you're the man!
You see that guy over there...he's mushy at cross country.