Bombed my pants. When a female, who's on her period, has a rather atomic leak, and either isn't wearing under wear, or has no pad on. This term can also be used for the shitting of the pants.
Girl-*runs to bathroom*
5 seconds later
(from in stall)- "FUCK-FUCK-FUCK-FUCK-FUCK!!!!! Ohhhh shit! I bombed my pants!"