1 definition by September 1

To break up with one's significant other after being miserable in the relationship for years.
"Dude, did you hear the news? I finally September Firsted the shit out of my girlfriend"

"Bro, it's September 1. Are you going to September First the gf?" "Yeah man, next September 1."
by September 1 September 25, 2017
Get the September First mug.