son of a gun

bastard, beast, bleeder [British], blighter [chiefly British], boor, bounder, bugger, buzzard, cad, chuff, churl, clown, creep, cretin, crud [slang], crumb [slang], cur, dirtbag [slang], dog, fink, heel, hound, jerk, joker, louse, lout, pill, rat, rat fink, reptile, rotter, schmuck [slang], scum, scumbag [slang], scuzzball [slang], skunk, sleaze, sleazebag [slang], sleazeball [slang], slime, slimeball [slang], slob, snake, so-and-so, sod [chiefly British], stinkard, stinker, swine, toad, varmint, vermin

baby, being, bird, bod [British], body, character, cookie (or cooky), creature, customer, devil, duck, egg, face, fish, guy, head, human, human being, individual, life, man, mortal, party, person, personage, scout, slob, sort, soul, specimen, stiff, thing, wight