When fuzz or lint attaches to a strand of butt hair tricking someone into thinking it’s a true dingleberry. It’s primarily the color underwear worn that day or could be a multitude of colors depending on when you last washed your cornhole.
Jerry was disgusted with himself after getting his salad tossed and the girl pulled out what he thought was a dingleberry. He was relieved when she informed him it was only a trickleberry.