The initial idioms of the letter B

behind its time	behind schedule
behind someone's back	behind the bit
behind the curve	behind the scenes
behind the times	behind the wheel
Behind you!	behind-the-counter
behold	beholden to (someone)
beholder	it behooves one to do
behoove one to do	beige
being	be out of sorts
being that	bejeebers
bejeer	scare the bejesus out of (someone)
belabor the point	belch
belch out	belch up
belcher	belfry
Belgravian	son of Belial