1. Boot (or bump) to the head-- An unexpected hit to someone's dignity when they say something incredibly stupid in a debate and are smacked off their pillar left speechless. Usually ends the debate. For some reason it is also occasionally being used as a term for hanging out, much like the term "kick it."
Man: I need $2.25 in quarters out of this $5 bill.
Cashier: So you need $3 in quarters?
Man: No, I said $2.25 out of this $5.
Cashier: But sir, how do I give you $2.25 in quarters without giving you change equalling $3 in quarters?
Man: ...I just got btth.
Cashier: Save the acronyms for chat rooms, nerd.
Man: LOL
Cashier: GET OUT.
Cashier: So you need $3 in quarters?
Man: No, I said $2.25 out of this $5.
Cashier: But sir, how do I give you $2.25 in quarters without giving you change equalling $3 in quarters?
Man: ...I just got btth.
Cashier: Save the acronyms for chat rooms, nerd.
Man: LOL
Cashier: GET OUT.
by Doug Young November 13, 2006
Boot to the Head: Giving someone a boot to the head is like giving them a smack to the back of the head, when they are out of line, rude, crude or stupid.
by BootsieToo April 8, 2013