Three Two One, dick on your head!

a term used to publicly announce when someone has just made an idiotic comment. It usully starts with the countdown "three, two, one," followed by the person franticly pointing at forhead then pointing at person who made the the idiotic comment, then the person announce's "dick on your head" in an aggressive/lighthearted way, depending on how stupid the comment was.
can also be used as a greeting.