"to hit," 1931, probably of imitative origin; 1975 in sense of "have sexual intercourse with." Related: Bonked; bonking. As a noun from 1938; in the sexual sense by 1984.
Synonyms: sleep together / roll in the hay / love / make out / make love / sleep with / get laid / have sex / know / do it / be intimate / have intercourse / have it away / have it off / screw / fuck / jazz / eff / hump / lie with / bed / have a go at it / bang / get it on
