brown bread

a little bit of bread and no cheese

Used to represent the song of the yellowhammer (Emberiza citrinella).

best thing since sliced bread

Alternative form of greatest thing since sliced bread.

bread and butter

That which is central or fundamental, as to one's business, survival, or income; a staple or cornerstone.

bread and circuses

Food and entertainment provided by the state, particularly if intended to placate the people.

bread of life

Anything which is regarded as a source or inspiration of spiritual nourishment.

brown bag

A short presentation or seminar on a given subject, especially one given at lunchtime.

brown noser

One who brownnoses (flatters or humors somebody in an obsequious manner for personal gain); one who sucks up; a bootlicker, dickrider, ass-kisser, sycophant.

brown power

The production of electricity made from conventional sources, such as coal, oil, natural gas and nuclear power.