4. You Use "You're Gonna Need A Bigger Boat" For Everything
It's only ever a bonus if you actually need a bigger boat and it's only funny when people understand the reference. It's probably the best line in the whole film and Roy Scheider improvised it, but it can definitely be used in a whole variety of social situations: rubber dinghies that you can't squeeze your bum into = bigger boat. Doing your weekly shop with the hope that you could fit everything into a basket when you know that you need a trolley = bigger boat. Then there's the classic; when a great white shark is bigger than you thought and it's going to eat your boat = definitely in need of a bigger boat. Maybe something like a cruise liner.