Too much of a good thing, not necessarily mayonnaise but anything that too much of just ruins the goodness of said thing.
Friend 1: I finally got those extra hours I've been asking my boss for.
Friend 2: That's good.
Friend 1: Yeah, but it's during my birthday Saturday and the game Sunday. I mean I'll take it but, damn.
Friend 2: Oh, hooked ya up like extra mayonnaise, huh?