I have a guy in a white truck that yells "*******" (presumably) every time we cross paths. Four times last summer, four times so far this spring. Always at the same location at about the same time (6:30-6:45 in the morning or 3:45-4:00 in the afternoon)
This morning he was stuck at a red light and I got a good look at him. If I was thinking I would have gotten his plates, for my reference. I just stared him down as he yelled and tipped my helmet at him

I have no reason to be mad. Part of me wishes I knew why he was. Just weird...
(I guess I should acknowledge the good with the bad. I've gotten my fair share of looks by the fairer sex and a few whistles/cat calls over the years. And a few guys who will wave or give me a thumbs-up)