something or someone that causes trouble; a source of unhappiness; "washing dishes was a nuisance before we got a dish washer"; "a bit of a bother"; "he's not a friend, he's an infliction"
a playing card that is usually printed with a picture of a jester
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"
a person who enjoys telling or playing jokes
a person who does something thoughtless or annoying; "some joker is blocking the driveway"