tad, n.³ — Green’s Dictionary of Slang

tad n.³

[Penn. regional ‘A person of questionable morals’ [DARE]; ? link to tad n.² (1), i.e. a slur on the Irish, but chrono may render this impossible]

1. (US) a prostitute, a woman deemed immoral.

1842		Whip & Satirist of NY & Brooklyn (NY) 21 May n.p.: Next week I will touch some of the tads who visit Cad’s, as also so those at Mary Miller’s.
1856		Life in Boston & N.Y. (Boston, MA) 11 Oct. n.p.: Bill T—r had better stop running after that white-shawled tad.

2. an immoral man; a womanizer.

1856

Life in Boston & N.Y. (Boston, MA) 25 Oct. n.p.: Ned K—n swears he will not go after negro snaps any more. It is near time, you galvanized tad.