Rough diamond a person who is generally of good character but lacks manners, education, or style (literally, an uncut diamond).
rough music noisy uproar as intended to display public outrage or discontent at the behaviour of others; rough music was traditionally produced by banging together pots, pans, and other domestic utensils; it was likely to accompany the skimmington procession.
Rough Rider an irregular cavalryman; in particular, a member of a volunteer cavalry force during the Spanish-American War, the Rough Riders, raised and commanded by Theodore Roosevelt.
the rough side of someone's tongue a scolding.
take the rough with the smooth accept the unpleasant aspects of life as well as the good.