To aggressively masturbate.
I was just Boiling Clams in the bathroom.
Boiling The Clam
When a woman masturbates in the shower using boiling hot water.
Female 1: Man, I'm having a hard time walking today
Female 2: Why?
Female: I was Boiling The Clam this morning.
The Clam Boil is when a woman's vaginal area sweats under high tension situations. The equivalent of swat , or, "sweaty twat", and closely related to the condition of swalls for men.
Spandex was a bad choice; I'm hosting a clam boil in my pants