slong slapper 

A person that gives a bad hand-job

That girl she as terrible. She is such a slong slapper

slong slapper by Home's March 15, 2015

Knee Slapper slong 

A knee slapper slong is a penis long enough to slap against a man's knee.

Jaime is endowed with a knee slapper slong!

Knee Slapper slong by I, Wreckerrr October 13, 2016

shlong slapper

a joke so funny you have to slap in or around your shlongin, similar to a cunt slapper

"that was a real shlong slapper"

shlong slapper by say from mtv news October 28, 2007

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