A parlay or accumulator is a single bet that links together two or more individual wagers and is dependent on all of those wagers winning together. The benefit of the parlay is that there are much higher payoffs than placing each individual bet separately since the difficulty of hitting it is much higher. If any of the bets in the parlay loses, the entire parlay loses. If any of the plays in the parlay pushes, the parlay reverts to a lower number of teams with the odds reducing accordingly. Gambling (or betting) is any behavior involving risking money or valuables (making a wager or placing a stake) on the outcome of a game, contest, or other event in which the outcome of that activity depends partially or totally upon chance or upon ones ability to do something. ...
Example
It is the PARLAY that there would have been someone there to take a picture at just the right moment. And the the greater parlay that he would post here. And the even greater parlay still that I would have ignored the thread so long.
A full cover bet is any bet which consists of all available multiples bets within a given number of selections. ... A Trixie is a special bet found in British bookmakers consisting of four bets covering three selections. ... An Each Way bet is the collective bookmaker name for two bets covering one selection in which the first bet is for the selection to win, if the selection does not come first this part of the bet is lost. ...
External links
About.com definition
Parlay Odds Calculator - Calculate the payout of a potential parlay.