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bday (plural bdays)
- (Internet slang, text messaging) Abbreviation of .
- Happy bday!
- 2008, Lorene Scafaria, Nick and Norah's Infinite Playlist, spoken by Nick (Michael Cera):
- I think last time we spoke we both kind of said some really nasty things that neither of us meant, like… you broke up with me… on my b-day.