When someone sticks two fingers into their girlfriends vagina after sex, bending one finger slightly and turn them as if to lock a door. It is believed that this will prevent cheating or foul play.
oh honey don't leave without locking me up with the key
When you slap your penis hard against a girls vagina who has a bad yeast infection. It sounds similar to stepping knee deep in swamp mud.
Yo that biddy is totally sloppy, you can her that swamp slapshot from a mile away.