Slippery Slingshot 

After your finished taking your girlfriend from the front, you pull out the condom full of semen.(she doesnt know you blew your load) While pretending to blow a load in her face, she closes her eyes which is when you take the condom and sling shot her in the eye.

Dude, i gave kelly the Slippery Slingshot and now shes blind.

Slippery Slingshot by KJmagicSauce November 3, 2004

slippery sling-shot 

a sexual finishing move where after the male ejaculates into a condom, he quickly removes it, takes aim, and fires it at his partner's face. can be friendly, but is usually beyond rude. see angry pirate .

hey joey, if you really want to end your relationship with suzy, there's always the slippery sling-shot .

slippery sling-shot by jonny, sick, raina, cain fiddlekiller.com November 3, 2006