1/2 oz Tequila
1/2 oz Amaretto
1 splash Lime juice
Layer in a shot glass with the tequila on the bottom, amaretto in the middle, and a splash of lime juice on top.
This bizarre shot originated in a club in Toronto when a friend of mine (after quite a few drinks) said he would drink any shot: namely tequila, wine and amaretto. I didn't think wine would go too well, so I substituted lime, and bought him the shot. He said it tasted good, and the TLA was born. Of course, bartenders still look at us funny whenever we order it...