The "Gooey Duck" is when you and your lady friend are having sex in a pool, hot tub, or any other body of water, and when you cum you pull out and put one of her legs on the side of the pool and jizz on it. That way, when she puts it back in the water, she swims weird because she is trying to get it all off, much in the way a duck would swim if it had something sticky stuck to it's leg.
Dray: I gave Nicole Peaslee a gooey duck when we had sweet HxC sex all night in the pool last night because she is hot and loves my naked body.
Haney: Okay. . .