smacker noun5 •One who smacks or spanks.It makes no difference whether the SMC is the smacker or the smackee. Does the SMC talk about physical violence in a matter-of-fact way? This isn't passion; it is evidence of sickness. — 2001 •(slang, humorous) (chiefly in the plural): A unit of currency, especially a dollar or pound. •(slang, humorous) A loud kiss.She planted me with a smacker so scorchy it singed my socks. — 1991 •(slang, humorous) (chiefly in the plural) A lip.Who can doubt then, that ANACREON'S beauty was furnished with a pair of such exquisite smackers. — 1838 •One who makes a smacking noise, especially while eating. formssmackers