To push the boat out

Origin

The phrase 'to push the boat out' sails straight from the grand, celebratory spectacle of a ship launch. Historically, the debut of a new vessel was a momentous and incredibly expensive affair, demanding considerable investment in both its construction and its ceremonial launch. Getting the massive hull from the dry dock or slipway into the water often required immense effort, special equipment, and a large team. Such an occasion wasn't just practical; it was a lavish social event, complete with dignitaries, champagne, and widespread festivity. To 'push the boat out' literally meant to spare no expense for this grand nautical inauguration, a tradition that soon extended to any lavish spending for a special celebration or occasion.