A not-so-often used phrase which can mean multiple things:
1) (V) The act of sticking one's scrotum into a taco. It is optional whether to attempt to cook it or not.
2) (ADJ.) A synonym for crouching repeatedly over a dead player in an FPS like HALO or CoD.
3) (V) What someone does to celebrate a goal in a game of rugby/football. After touching the ball down, the scorer leaves it on the ground and does push-ups with their crotch over the ball.
1) JOHNNY: Man, school was a real f*cker today. I'm
gonna go do a taco touchdown.
JAMES: Ooh, I'll bring the sauce!
2) JOHNNY: Eat lead, James! *machine guns him to death*
JAMES: Oh no, not the taco touchdown!
3) JOHNNY: *scores tri and starts dry humping the ball*
EAT TACO TOUCHDOWN, B*TCHES!
JAMES: Ah sh*t, not again...