Adj.
1. (of a performance) very intensely fah-bulous, usually impromptu, solo
pieceEven though it deviates from the planned performance, neither the fellow performers nor the audience/viewers object, because it enhances the original performance.
2. incredibly
good, unbelievably
good, defies expectations with how fabulous it is, utterly fah-bulous
Christine: That
guitar sesh in the outro was foilissimo!
M: Oh you mean how he went off-script when he started jamming with his
guitar but it only made the performance more incredible?
Christine:
Yes! And also how utterly fah-bulous the actual jam was!
Dona: Foilissimo indeed!