Rofl, back to subject.. I always find myself and my friends talking to each other in the tribes voices.. and then we'll be messing around and say (dueschat) vgx (You idiot!).
And when I watch a movie and someone gets shot in the head, or in real life when someone hits their head I always find myself saying "Headshot!"
Of course.. I only say this stuff around my friends who play CS, or Tribes.