pheasant heart
When someone unzips their pants and puts one of their balls between their fingers and asks someone who is not looking if they've ever seen a pheasant heart before. The person then turns around curiously and inevitable witnesses a pheasant heart.
Andy (unzips his pants placing one ball between his fingers) - Hey Chris, have you ever seen a pheasant heart?
Chris (turns around) - Oh! You sick fuck.
Chris (turns around) - Oh! You sick fuck.