When someone reveals a previously unknown aspect of something which you likely would have rather learned on your own.

*discussions of art media such as video games, movies, etc. especially vulnerable.

Something that could ruin something aobut a game for someone who hasn't played it yet. For example, revealing major parts of the plot or big storyline events to others.

Something a ricer attaches to the back of his car to get downforce on the rear wheels. Too bad their rice rockets are front wheel drive!

In vehicles:

A device attatched to a car- usually at the rear, that changes the aerodynamic shape of a vehicle, reduces drag- which does not add downforce- and acts as a rear diffuser, eliminating a vacuum effect at the rear end of the car and improving gas milage.

Often mistaken for a wing or airfoil, which does the opposite by creating drag.

Before you hit that down button, google wing vs. spoiler.

A pice of bodywork usuall on the rear of a car which "spoils" the airflow, thereby creating downforce over the rear wheels. Which everyone knows except Will Rastall...

see also jessops

A candidate in a campaign whose chances of winning are near zero but still may garner enough votes as to cause the loss of one of the leading candidates.

Meaning One:

An aerodymanical feature that 'spoils' the air flow by forcing any air that reaches it into the shape, pushing the rear end of the vehicle downwards, this is used to improve handling and to increase downforce.

Meaning Two:

Information that could spoil the experience of a certain game, may that be a console game or a PC game. Spoilers usually come woth warnings to stop people who havent seen the whole game yet, to prevent them seeing the information before they discover it themselfs.