A tequila shot antic in which the drinker:
1.snorts a line of salt
2.slams the shot of tequila
3.squeezes the lime in his/her eye.
This shot was allegedly invented by Steve-o of Jackass fame.
My attention-whoring roommate performed a tequila stuntman in front of the whole bar and didn't have to pay for drinks the rest of the night.