What is Birthdai Shmex?
when someone has Shmexy has sex or "Shmex" on there birthday.
Joe: "hey cindy. its mah Birthday!"
Cindy: "Oh happy birthday!"
Joe: "so you wanna have sum Birthdai Shmex wit meh"?
Cindy: "OK! i cant wait!"
See sex, birthday, shmex, shmexy