Mexican Fireworks
when a guy is close to finish, he pulls out and yells "Arriba!" (hence, mexican) as he gives the girl a "Money Shot" (therefore, fireworks)
Girl 1: what was all that commotion from your bedroom? and what happened to your face? why is it sticky?
Girl 2: he gave me Mexican Fireworks...
Girl 1: eww
Girl 2: he gave me Mexican Fireworks...
Girl 1: eww