- (Internet, slang) Something undesirable; an exclamation suggesting an unwanted result or condition.
This phrase is a contrived antithesis of for the win, and is crafted to mean exactly opposite to that phrase in every way.
More often than not, this phrase is used online and shortened to "FTL". Very frequently, the phrase will be used in fragments lacking verbs; e.g.: "Another all-day meeting FTL."