Berty

adj.

Heard in Mayo

Mad or crazy. Can mean either extremely good or extremely bad. Also: savage.

In use

Hes berty that fella" "What a berty nite last nite!" "Mantra was berty last night!

Posh English

He is quite mad, that fellow. What an utterly wild night it was last night. The event at Mantra was positively savage last night.