Joker - Definition
joker
n 1: a person who enjoys telling or playing jokes [syn: joker,
jokester]
2: a person who does something thoughtless or annoying; "some
joker is blocking the driveway" [syn: joker, turkey]
3: an inconspicuous clause in a document or bill that affects
its meaning in a way that is not immediately apparent; "when
I demanded my money he showed me the joker in the contract"
4: a playing card that is usually printed with a picture of a
jester