When two people hold strongly to opposite beliefs but choose to remain friendly with each other in spite of their differences. Let's face it... no two people agree about everything, so sometimes you just gotta give a little.
Joe: I think John McCain is a blithering idiot.
Bob: Well I think Obama might be the anti-christ.
Joe: Well, let's just agree to disagree. Wanna do lunch?
Bob: Sure thing, old buddy! How about "The Greasy Spoon Diner"... I love that place!