Top definition
1. The thing you say to wish someone a happy fucking birthday (noun)

2. Something you call someone on their birthday. (Adjective)
1. Happy birthfag,Jessica.
2. It's this birthfag's special day,suckas.
by Mcrbirthfag666 February 26, 2018
Get the mug
Get a Birthfag mug for your father-in-law José.