The initial idioms of the letter B

be done like a dinner	be done to a turn
be done to death	and be done with it
be doped to the gills	be down
be down in the dumps	be down in the mouth
be down on like a ton of bricks	be down on luck
be down on (one's) luck	be down on (one) like a ton of bricks
be down on (someone or something)	be down to (do something)
be down to (someone)	be down with (something)
down with	be dragged kicking and screaming
be dressed to kill	be dressed up to the nines
be dropping like flies	be duck soup
be duty bound	die for
be dying for (something)	die to
be (as) easy as rolling off (of) a log	be easy on the ear
be easy on the eye	be even (with someone)