[jok.er] n (1729) 1 a: a person given to joking: wag b: fellow, guy; esp: an insignificant, obnoxious, or incompetent person "a shame to let a ~ like this win --Harold Robbins"
2: a playing card added to a pack as a wild card or as the highest-ranking card 3 a (1): an ambiguous or apparently immaterial clause inserted in a legislative bill to make it inoperative or uncertain in some respect (2): an unsuspected, misleading, or misunderstood clause, phrase, or word in a document that nullifies or greatly alters it b: something (as an expedient or stratagem) held in reserve to gain an end or escape from a predicament c: an unsuspected or not readily apparent fact, factor, or condition that thwarts or nullifies a seeming advantage