v. After defeating your opponents in battle, rendering them helpless on the ground, the act of squatting on their face multiple times with your sweaty pussy lips exposed until they dry heave or vomit.
"Amy, that was an awesome fight yesterday!" You fuckin' crushed him!"
Damn straight! Did you see how many times I clamslapped his ugly mug! Muthafucka!"
The female version of teabagging in which the vagina is placed on one's face, usually to establish dominance. Frequently used by female video game players after fragging another player.
Three days ago, I had a blind date with a guy nicknamed Tiny. I’ve got to say, once we got back to his place and started getting after each other, his Clamslammer was anything but tiny.