An honest, ethical person who makes good decisions. Primarily heard in US. Kristen was often mocked by her peers for being a straight arrow who always followed the rules and stayed out of trouble.
n. an honest person; a law-abiding citizen. (see also straight shooter.) Willy is really a straight arrow at heart—as long as he’s not around Max. Max is not a straight arrow. Slime is more like it.
A conventional and ethical person. As morally straight as an arrow, that person is likely to be dull. As used in colleges during the mid- 20th century, a straight arrow wasn't the type who'd get drunk or use drugs. If female, her necking, petting, or going further was out of the question.