It's where you got the old whiskey dick and you try to fool the cuntbag by sneakily using your fingers, or any other hard object within reach, instead of your cock.
Dude 1: So bro what did you do with that girl last night?
Dude 2: Nig I gave her the ol' stiff mcgiff.
Dude 1: What you had whiskey dick?
Dude 2: Ellll yea.