Tainted Sausage

When you find out a guy has already slept with a close friend. (male or female, it's still sausage)
See Tainted Beef for a woman.

Dude 1 'Dude, I was gona sleep with Kyle, but then I found out you already had'
Dudette 1 'Ah man that sucks, doesn't matter though, he was tepid at best'
Dude 2 ' When a friend taints your prospect sausage it hurts hard, ahh... Tainted Sausage'