Joker

n.	1.	One who makes jokes or jests.
	2.	(Card Playing) See Best bower, under 2d Bower.
	3.	(Card Playing) An extra card usually included in a deck of playing cards, having the same design as the others on the back, but on the face having a picture of a jester. It is not included in the deck used in most games, but in certain games may be included and then takes on a special value, such as the highest-valued card, or a wild card.
	4.	A clause placed in a document, such as a contract or a piece of legislation, not itself appearing significant, but in a subtle way substantially changing the effect of the document.
	5.	Any fact or condition which is unknown or not apparent, which reverses an apparently advantageous position; a kicker.
	6.	A person; a fellow; a chap; - usually used in a mildly disparaging sense; as, who's the joker who left the ice cream on the table?.

Noun	1.	joker - a person who enjoys telling or playing jokes Synonyms: jokester
	2.	joker - a person who does something thoughtless or annoying; "some joker is blocking the driveway" Synonyms: turkey

Adamite, Artful Dodger, Casanova, Don Juan, Machiavel, Machiavelli, Machiavellian, ace, actor, artful dodge, artifice, astonishment, bad boy, bag of tricks, bamboozler, banana, bastard, befuddler, beguiler, being, best bower, bill, bird, blind, block, blockade, blockbuster, blow, bluff, body, bomb, bombshell, booger, bosey, bottleneck, boundary condition, bower, buffoon, bugger, burlesquer, calendar, card, cards, caricaturist, cat, catch, catch-22, chap, character, charmer, chicanery, chouse, clause, clown, clubs, comedienne, companion bills amendment, condition, cordon, counterfeiter, creature, crux, curtain, curve, curve-ball, customer, cutup, deceiver, deck, deluder, design, determent, deterrent, deuce, device, devil, diamonds, difficulty, dirty deal, dirty trick, dissembler, dissimulator, dodge, dodger, donnee, double-dealer, dragnet clause, drawback, droll, duck, dummy, duper, earthling, earthshaker, elf, enacting clause, enchanter, enfant terrible, entrancer, epigrammatist, escalator clause, escape clause, escape hatch, eye-opener, face cards, faker, farceur, fast deal, feint, feller, fellow, fetch, ficelle, fine print, flush, fooler, forger, full house, funmaker, funnyman, gag writer, gagman, gagster, gambit, gay deceiver, gimmick, given, googly, groundling, grounds, guy, hand, hang-up, hazard, head, hearts, hitch, hoaxer, hocus-pocus, hold-up bill, homo, hood, hoodlum, hooligan, human, human being, hurdle, hypnotizer, imp, individual, ironist, jack, jasper, jilt, jilter, jokesmith, jokester, juggle, kicker, kidder, king, knave, lad, lampooner, left bower, leg-puller, life, limiting condition, little devil, little monkey, little rascal, living soul, madcap, man, mesmerizer, minx, mischief, mischief-maker, misleader, mortal, motion, nose, objection, obligation, obstacle, obstruction, obstructive, omnibus bill, one, one small difficulty, pack, pair, parameter, parodist, party, pass, peripeteia, person, personage, personality, picture cards, pinch, pitfall, pixie, plagiarist, plagiarizer, playactor, playing cards, ploy, practical joker, prankster, prerequisite, privileged question, provision, provisions, proviso, puck, punner, punster, queen, question, quipster, ragger, rapscallion, rascal, reparteeist, requisite, revelation, rider, rogue, role-player, round, rowdy, royal flush, rub, rubber, ruff, ruffian, ruse, satirist, saving clause, scamp, scapegrace, scheme, scurvy trick, seducer, shift, shocker, sine qua non, single, singleton, sleight, sleight of hand, sleight-of-hand trick, small print, snag, somebody, someone, soul, spades, specification, spoofer, staggerer, startler, stipulation, straight, stratagem, string, stud, stumbling block, stumbling stone, subterfuge, surprisal, surprise, surprise ending, surprise package, surprise party, switch, tease, teaser, tellurian, terms, terran, thunderbolt, thunderclap, trap, trey, trick, trump, twist, ultimatum, wag, wagwit, whereas, wile, wisecracker, witling, worldling, zany