大盤振る舞い

Etymology
/ohobanburumahi/: *[opobanburumapi] → [oɸobanburumaɸi] → [owobanburumawi] → [oobanburumai] → [oːbanburumai]. 大盤 is ateji; was originally 椀飯. Medial voicing due to compounding.

Noun

 * 1) a large banquet; a feast