brown thumb

brown bag

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

brown bread

Dead.

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.

brown study

A melancholy mood accompanied by deep thought; a moody daydream.

butcher's thumb

A dishonest practice in which a butcher uses their thumb to add extra weight to a scale when weighing meat.

fash one's thumb

To bother oneself; to worry about something.

green thumb

A natural skill for gardening.