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A rare phenomenon that occurs when someone's birthday occurs on the same day as Thanksgiving.

Origin of Word: Portmanteau of the English words "Birthday" and "Thanksgiving".
M: "Happy Birthdanksgiving, Craig!"
C: "Thanks, Matt! Isn't it nuts how i'm gonna have to figure out how to eat a whole turkey and a birthday cake within a single day?"
M: "You know you don't have to eat the WHOLE turkey, right?"
C: "wait what"
by expecto-petroleum November 26, 2020
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by ecogoth December 30, 2020
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2
A rare phenomenon that occurs when someone's birthday coincidentally falls on thanksgiving
"Happy birthdanksgiving, Craig!"
"Thanks, Matt! I'm gonna have to figure out how to eat a turkey and a birthday cake in the same night!"
by expecto-petroleum November 26, 2020
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