Used to suggest indulgence or extravagant actions, especially for special occasions. When she was promoted, we pushed the boat out with an upscale dinner.
Pro Tip 2/3
Not Everyday
Suggests actions that are not common or typical, but done on rare occasions. We don't usually dine at fancy places, but tonight we'll push the boat out.
Pro Tip 3/3
Budget Stretch
Implies spending beyond what one normally would, often to the point of extravagance. We pushed the boat out for our anniversary and booked the most expensive suite.