Back in the 1980's a friend of mine made a bet I couldn't get these letters on the new Wisconsin Vanity plates for my 1968 AMX. YOMAMA showed up in the mail much to my surprise.
One night I was stopped in Milwaukee, WI by a black police officer for being in a car lot looking at cars after it closed and he called in the plate to the main office reading each letter and not realizing the word.
The dispatcher came back on laughing and said \\\\\\\"Yo Mama\\\\\\\'s OK\\\\\\\" and the policeman laughed so hard I thought he would wet himself.
He told me to go home and avoid driving through residential areas because of the plate. I was from a small town 80 miles North. They hang in my garage today.