I call it "The Heisenberg" and it's pretty damn good according to what I was told by my friends (and myself). It's pretty simple to make, too.
2 parts Blue Curaçao
2 parts Peach Schnapps
1 part Vodka
Mix in shaker with ice
Serve in shot glass
Add a drop of "blood" (Grenadine) before serving
Optional: garnish glass with "meth" (sugar crystals)
For a stronger, less sweet shot, use equal parts Curacao, Schnapps, and Vodka.