full sail; sailing downwind
Nautical term for a ship with all sails set, often implying sailing with the wind. Can also be used metaphorically for moving forward at full speed or with full energy.
The ship left the harbor under full sail.
The new business is moving forward at full sail.
smooth sailing; plain sailing; everything going well
Compound of 満 (full) and 帆 (sail). The reading まんぱん is the on'yomi of both characters.