The massive retention of water in the legs due to various health issues. Also known to be caused by mental stress brought on by divorce, and specifically, divorce resulting from your spouses new found lesbianism.
Ryan: "Your legs are massive and look as though they are full of water."
Justin: "Don't make fun of me...I'm all fucked up. My wife is a lesbian and now I have water legs."
Ryan: "You make me want to vomit!"