kicker

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that kicks.
• noun A sudden, surprising turn of events or ending; a twist.
• noun A tricky or concealed condition; a pitfall.
• noun A condition that imposes an automatic increase, as in a pension plan.
• noun A small outboard motor.

from The Century Dictionary.

• noun One who or that which kicks.
• noun One who offers strong, and especially unexpected or perverse, opposition; one who objects or opposes; a bolter.
• noun Nautical, the propeller of a small launch.
• noun In cricket, a ball which kicks or bumps, that is, which rises higher than usual after pitching.
• noun In poker, a card held up with a pair, usually an ace or king.
• noun The reversing gear of some direct-acting steam and hydraulic pumps.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who, or that which, kicks.
• noun informal A fact, condition, or circumstance, sometimes concealed or not obvious, which reduces or eliminates the benefit of an apparently advantageous situation; a joker{5}.
• noun An unforeseen added expense or additional cost.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun One who kicks.
• noun sports One who takes kicks.
• noun nautical The kicking strap.
• noun nautical, informal An outboard motor.
• noun colloquial An unexpected situation or detail.
• noun finance An enticement for investors, e.g. warranty added to the investment contract.
• noun poker An unpaired card which is part of a pair, two pair, or three of a kind poker hand.
• noun slang, southern US A particular type of resident of Texas who is associated with country/western attire, attitudes, and/or philosophy.
• noun journalism The last paragraph or two of a story.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a player who kicks the football