It means "bet bro", basically saying alright or cool.
Someone says y'all are going to hangout later and they would reply by saying "betro"
by 405cj July 22, 2018
Get the Betro neck gaiter and mug.
A word used by Highschool especially white drug dealers when a time and place for the deal has been decided, this is them trying to be edgy and or popular
Ight betro I'll get you that eighth on Monday
by HS_stoner27 March 16, 2018
Get a Betro mug for your Facebook friend Callisto.