boiling clams

To aggressively masturbate.

I was just Boiling Clams in the bathroom.

Clam Boil

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