off (one he she it) goes! イディオム
off (one/he/she/it) goes!|go|goes|off|off he goes|
v. phr. Said of a person, a vehicle, or a memorable thing who/which has started leaving or moving, both as a statement of fact (declarative assertion) or as a command (imperative). When the boat hit the water in the formal launching ceremony, they cried out simultaneously, "Off she goes!"off (one/he/she/it) goes!|go|goes|off|off he goes|
v. phr. Said of a person, a vehicle, or a memorable affair who/which has started abrogation or moving, both as a account of actuality (declarative assertion) or as a command (imperative). When the baiter hit the baptize in the academic ablution ceremony, they cried out simultaneously, "Off she goes!" Dictionary