Top Definition
The simpsons annual halloween episode, which consists of three mini-episodes. Possibly one of the best series of halloween specials on tv, though it has become less exciting and spooky as it used to be.
Person 1: Oh boy! The Simpsons Treehouse of Horror episode is on tonight!

Person 2: I'll just watch an old one online. The new ones have been about transformers on christmas and thanksgiving turkeys. What happened to the crazy dolls and witches?
by simp123 May 10, 2010
1 Word related to treehouse of horror

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