Same thing as "throthing at the gash" but for the backside.

When an undesignated gender gets their ass wet just at the anticipation from witnessing someone do something inspiring/sexy
Bobby: Bro
Tom: What?
Bobby: You can't be making plays like that man, you had me frothing at the slash o.o
by The Moonlit Shadow October 28, 2021
Get the Frothing At The Slash mug.