In the act of sexual intercourse, when the man doesn't have any sex toys so instead uses a brand new carrot and sticks it in her vagina or ass then eats it.
"Oh god man, me and Karen were about to do it so i did a Dirty Cheyenne “
When you fuck your girl For the first time in the local movie theater bathroom and you are mentally incompetent and accidentally slip your dick from the pussy to ass.
A man uses a strap on and has anal sex with one's self and then deficates all over their boyfriend/girlfriend. Also Dirty Cheyton can be used to describe a nasty man with a small penis