1. A discreet way of referring to someone who enjoys receiving dick in their ass; often used when the upmost subtlety is called for.
2. A homosexual; especially one who prefers receiving instead of pitching.
Male Friend #2: Oh John… you’re such a pickle butt! Sorry I can’t go, but I’ve just got too many things to do today. I’m gonna be busy for a while… fucking pickle-butt.