I. noun
Etymology: black-and-tan
1. often capitalized B&T : a black-and-tan dog ; specifically : a black-and-tan hound
2. usually black-and-tan : a nightclub frequented by both Negroes and whites
3. often capitalized B&T : a member of the black-and-tan faction of the Republican party in the southern U.S. — opposed to lily-white
4. capitalized B&T : a recruit enlisted in England in 1920-21 for service in the Royal Irish Constabulary against the armed movement for Irish independence
II. noun
chiefly Britain : a drink consisting of a dark beer (as stout or porter) and ale or beer of a paler color