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Phrase used to describe something which is unbelievably gay or a person who is unbelievably gay aswell!
Jesus Christ, have you checked out Mark's latest status?

Yeah, its fu*#ing GayGantic!
by Cal Chuchesta November 08, 2010
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Aug 3 Word of the Day
Condition which causes you to place an Amazon order, then shortly after remember something else you needed and place another order.
Wow, 10 Amazon boxes showed up on my door today. My Amazheimer's must be acting up again.

Person 1: Bro, your Amazheimer's is getting out of control.
Person 2: It's OK, I have Prime.
by SamboMayhem August 01, 2020
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