check the prop
when your on a boat and you have to go to the bathroom, go into the water and hang off the end of the boat by the propellar and do your business in the water. this is a nicer way to say "im gonna go piss in the water"
hey i gotta go check the prop.
Checking the prop
An excuse to stay in the water after a water ski so you can urinate in the water
Hang on guys I'm just checking the prop