Noun. A person without common sense. A moron. Someone who shouldn't be in control because of his lack of common sense.
Example 1: That Greenblatt presented the teller with his ID before robbing the bank.

Example 2: A Greenblatt is running that network. Why else would they cancel that show.
by Richard January 6, 2005
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The effect where anyone learns about or becomes friends with Ariana Greenblatt they turn into a chill baddie with style. No one knows why this happens, but its spreading to teenage girls all over the internet.
Random fan: "Yo, have you seen Madi Filpowicz's new TikTok? She looks so different."
Smart fan: "Nah, its just the Ariana Greenblatt effect."
by supardupar December 29, 2023
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