The initial idioms of the letter B

be over	be own master
be own man	be own worst enemy
be packed like sardines	be packing (heat)
be part of life's rich pageant	be past
be past (the/one's) sell-by date	be past sell-by date
be penny-wise and pound-foolish	be pigeon
be pipped at the post	be plain sailing
plugged in, be	be poles apart
be potty about (something)	be prepared
be pulled down a notch (or two)	be pulled down a peg (or two)
pulled out of (one's) ass	be punch-drunk
be pushing up daisies	be put behind bars
be put in (one's) place	be put out of business
be put out of humour	be put out of sorts
be put through the hoop	be put through the mangle