Filling a filthy whore's pussy with your swinging meat dangle.
Stuffing some dripping meat drapes with your blue veined custard chucker.
Or fucking drunk.
"This bitch wanted to slam, but I didn't have a jimmy hat...but I slammed it anyway"
"I jus took you to a fuckin $30 a plate dinner - are we gonna slam or what?"
"I was slamming the hell out of this skeezie..."