When something makes you laugh, funny is the thing that made you laugh, and it's funny you didn't know.
Steve: Hey paul, what did you get your wife for the anniversery.
Paul: She wanted something she could use in the driveway that would go 0 to 300 in 80 seconds.
Steve: So what did you get her?
Paul: I put our bathroom scale on te driveway.
Steve: Thats not Funny... your a bully!