It means that (whatever happens to be the subject at hand) is fair enough that you agree. It's rather hard to explain because this isn't an expression but a legitimate use of two words in the language. It originated in the early 1900s America, as a colloquialism. Examples: "I'll do the dishes if you sweep the floor" "Fair enough" "You need to cut your hair if you want to keep working here" "Fair enough" --------- It was used as the titled of the the mock sit-com in Truth's anti-tobacco public service announcements, which centered around the schemes of tobacco executives. The title "Fair enough" is a little obscure (and perhaps confusing if you're new to the language) but was probably meant as one of the followings: 1) It pertains to the way the tobacco company run's it's business. The opening theme is "If you dont like it- tough, it's fair enough". Which is to say that the tobacco company skates the fine line between "fair" and "completely immoral" but it always stays barely within bounds and there's nothing you can do about it *raspberries* 2) Tobacco companies had made a public complaint about the Truth campaign. They said it wasn't fair for their tax money to be spent in making them look evil and thus the Truth campaign would have to take a less aggressive approach. Truth has always tried to relate to younger people and their rebellious attitude, thus "Fair enough" could mean "okay, here, we're not making you look like bad guys anymore, we're going to make you look so friendly that it's sarcastic"... and there's nothing you can do about it, we're being fair enough *raspberries* If that's the source of the question, I hope this helps.