Even in the US that's one with multiple semi-meanings.
Householders who cook indoors often use the term for what amounts to "baking meat."
Those who incinerate innocent road kill outdoors sometimes use the term to mean "cooking by radiant heat (broiling here, when done indoors) on a rotating spit."
Others, esp. of the latter persuasion, use the term only to mean "cooking a bird with a beer can up it's a..."
As with many activities1 where much misinformation comes from "friends" it's probably useless to try to be too pedantic about the terminology. Although it will likely be poorly done by many, regardless of what it's called, and sometimes quite well performed by those who use variant names and processes, as long as the participants have fun and are satisfied it can be worth doing.