i Register
In some senses, boffo is marked as slang, US. Watch for register when choosing this word.
adj
Outstanding; very good or successful.
“Come on, Lana. Give me and the bird a chance. We're boffo.”
And if the Hollywood stuff didn’t grab you, you could glom onto “RRR,” S.S. Rajamouli’s phenomenally successful Raj-era Indian action epic that, for sheer boffo exuberance, outdid anything the studios churned out this year.
noun
A great success; a hit.