The Dirty Shot is one of the easiest ways to ruin somebody's night at a party. When you notice your rival has had a bit too much to drink, you replace his/her shot glass with one full of cum. Enjoy as you watch first looks of confusion and then looks of horror.
Bro #1 'dude did you see that asshole matt last night'
Bro #2 'ya i can't beleive that douche took a dirty shot'
Bro #1 'i hope he gets AIDS'
A shot of liquor after it has been used as bong water.
Usually performed only as a sign of masculinity, as it won't get the drinker any higher and is actually quite disgusting.
We decided to get creative and fill the bong up with vodka, smoke a bowl, and take a couple dirty shots.