A sling fuck is when you’re fucking someone in a sling.
A sling fuck is a supporting black leather cradle that is strapped, hoisted to the roof with chains, which a person is able to lay back on, and wait to be sexually penetrated. See Bondage or Mistress.
A sling fuck is a dirty term used for promiscuous men and women at sex clubs that like to be fucked by lots of multiple partners. See slut or cockworshipper.
"I bet that little bitch is just begging for a sling fuck tonight!"
"Yeh I sling fucked that slut from the ghetto last night."
"Excuse me Miss Vanstone, would you be interested in a sling fuck tonight?" "Should I order the tip truck to slide you in?"