Fenders are inflated, vertically aligned, plastic cylinders which rest against the side of boats and prevent damage from fixed objects such as pontoons. There is a hole at either ending which can have a rope threaded through. If the bottom end of the fender dips below the waterline for a long period of time, straggly, curly weed collects around the lower hole giving the resemblance of an untrimmed vagina.
As the skipper lifted the fender of the water, the entire crew were impressed at the size of the fender fanny