The initial idioms of the letter B

be cold comfort	be coming apart at the seams
be comme il faut	be compos mentis
be comprised of	be conspicuous by absence
be conspicuous by (one's) absence	be cooked
be cooked to a turn	be cooking on gas
keep cool	be cup of tea
be cut adrift	be cut from the same cloth
be cut to the bone	cut up
be damned	be damned if do and damned if don't
be dead and buried	be dead from the neck up
be dead from the waist down	be dead in the water
be dead meat	be dead on feet
be dead on the vine	be dead to the world
be department	be descended from
be done	be done like a (dog's) dinner