gaff

familiarity, faux pas, gaffe, impropriety, indiscretion, solecism

blunder, bobble, boo-boo, boob [British], brick, clanger [British], clinker, error, fault, flub, fluff, fumble, gaffe, goof, inaccuracy, lapse, miscue, misstep, mistake, oversight, screwup, slip, slipup, stumble, trip

bamboozle, beguile, bluff, buffalo, burn, catch, con, cozen, deceive, delude, dupe, fake out, fool, gammon, gull, have, have on [chiefly British], hoax, hoodwink, hornswoggle, humbug, juggle, misguide, misinform, mislead, snooker, snow, spoof, string along, suck in, sucker, take in, trick

beat, bilk, bleed, cheat, chisel, chouse, con, cozen, defraud, diddle, do, do in, euchre, fiddle, fleece, flimflam, gyp, hose [slang], hustle, mulct, nobble [British slang], pluck, ream, rip off, rook, screw, shake down, short, shortchange, skin, skunk, squeeze, stick, stiff, sting, sucker, swindle, thimblerig, victimize