Foster's Home for Imaginary Friends, Season 4

Mr. Herriman:
Master Mac, when you told me you hate parties, my chief concern was protecting this one from you. But I see now no party is safe from the likes of you. You will destroy each and every one, even if that means destroying lives in the process. [leaves]

Mac:
But… [attempts to stop him but retracts sadly]

Eduardo:
You es muy, muy meano.

[Coco squawks annoyingly at him]

Wilt:
Maybe next time, you could talk about your problems, instead of taking them out on a little imaginary friend.

Frankie:
Like I didn't have enough to clean.

Goo:
You stink!

Bloo:
How could you, Mac? He was four years old today! Four years old.

Mac:
[upset] I thought it was my party.