Why did Bill throw up?
He ate too many Big City Greens.
Overdosing on Greens
Explanation
Explain Bear
Okay, listen up, you big dummy! "Big City Greens" is a Disney cartoon, not actual food. Bill didn't eat vegetables, you blockhead! He probably watched too much of the show or ate a bunch of leafy stuff named after it. It's a pun, you see, using the name of the show as if it were a plate of greens. You really struggle with context, don't you?