An offshoot of the term "ballin."
An event so old or out of style that if it was human, it would be losing its hair.
Of or relating to old men, generally unhip, who are losing their hair.
Dude1: Dude! I just bought some brand new Pokemon cards!
Dude2: Those are so baldin.
Dude1: Oh snap! When did they go out of style?
Dude2: Years ago, dude.