Also, exclamation to be yelled when totally flipping out on someone.
"BAMSTICK! I just WHOOPED your ass!"
by Swan May 08, 2003
Chiefly Scottish slang for a mad person, lunatic, or someone who displays such tendencies, often verging on being dangerous to the general public.
That Charlie Sheen is a complete bamstick.
by macstu23 March 12, 2011