A action or choise where you can either get it right or wrong with the same probibility. You say this to yourself to hide the fact that you really have a 90% chance of getting it wrong.
see:
gambleing
luck
cheated
A ska/punk band based in Atlanta GA. 50:50 Shot tours in the Southeast and plays many shows regularly. With catchy horns and rockin' guitar parts, they are the best Ska act in Atlanta Georgia.
A theory that subscribes to the notion that there are only 2 outcomes to any kind of situation. It either will happen, or it won't, no matter how unrealistic. There is therefore 50% chance either way.
Also used to piss someone off, in an un-winnable argument.
Anybody: Oi, Gimp, Scunthorpe Utd will win the Champions League within 3 years.
The Gimp: No they won't, Man Utd will.
Anybody: Fuck off Gimp. 50/50 theory says there is a 50% chance they will. Its simple, they either will or they won't, there are only 2 possible outcomes so fuck off!