Do dheartháir nó an bhuíon ceoil - - Your brother or the band (of music)

This humourous remark arises from the meaning of "Tá sé go han-mhaith"

"Sé" means both "he" and "it".

Buíon ceoil (should it be buion cheoil?) - - is a further example of the tuiseal ginideach.