Slang for the Canadian province of
Alberta.
You'll commonly find tradesmen, rig pigs, and people from Northern Alberta using this term unintentionally as it is part of their dialect. It isn't unheard of to hear it as far south as
Calgary or
Lethbridge.
It is commonly followed up with "boys", even when speaking to women or just one man.
"See that snow? It's starting to feel like berta, boys"
"
How come darts are so expensive
out here?"
"You're in fuckin' berta, boys"