boff

n. Slang

1. A line in a play or film, for example, that elicits a big laugh: "He doesn't go for the big boffs, artificially inflated, but lets his comedy build through a leisurely accumulation of bizarre details" (Vincent Canby).
2. A big laugh.
3. A conspicuous success. Also called boffo, boffola.

[Probably from B(OX) OFF(ICE).]

boff² (bŏf) Vulgar Slang.

v., boffed, boff·ing, boffs.

v.tr.
To have sexual intercourse with.

v.intr.
To engage in sexual intercourse.

[From boff, to hit, variant of buff, from Middle English buffe, a blow, from Old French, of imitative origin.]

noun

A dazzling, often sudden instance of success: hit, sleeper. Informal smash, smash hit, ten-strike, wow. Slang boffo, boffola. See thrive/fail/exist.