n. a person who enjoys telling or playing jokes
n. a person who does something thoughtless or annoying
n. an inconspicuous clause in a document or bill that affects its meaning in a way that is not immediately apparent
n. 纸牌中可当任何点数用的一张( joker的复数形式 ); 爱讲笑话的人; 难以捉摸的人; 行动诡秘的人