The Colorado Department of Revenue prohibits thousands of personalized license plate combinations every year. This year they put out the latest list of requests they actually rejected.
Some make little sense to me like Tabasco, God, Geeeek and Cokesux. Those don't seem offensive or over the top.
Then there are others that make me wonder why people would even want them. Like Honkie, Fartn, olfart, or stroke.
See all of the rejected plates and the rules for personalized plates here.