An Oklahoma man says the 'F' in his "F Cancer" license plate stands for fight but the Oklahoma state tax commission wants him to change his custom license plate, because people have been complaining about the implied vulgarity.

At just 32-years-old, Nick Williams says he's been through a war, and he's still fighting. “When I had my surgery, they got 60 percent of it. The other 40 percent was entwined in my brain My 'F' it stands for fight. Some people look at it as a different word, but I'm fighting brain cancer. I've had it for about 2 and half years now."

Williams has had surgery, chemotherapy, and countless visits to the hospital. "If it wasn't for him and my wife, I probably would have gave up a long time ago, really."

But giving up is not an option when you're the father of 5-year-old Kameron, who tells us his name is spelled with a 'K.'

Dad is focused on a different letter that he says has shaped his life: the letter 'F.'

So, when Williams got a letter from the tax commission saying he needed to change his "F Cancr" license plates, he called to plead his case. "After I told him what the plates said and everything, he got offensive, kind of. He said, 'oh, I get complaints all the time."

Williams understands that strangers may confuse the license plate at first, but like the scar on the side of his head, he says it's a symbol of pride that he chooses to wear proudly. "I used to try and cover it up with a hat. I tried to let my hair grow out, but it was so patchy it just never worked."

Williams plans to call the tax commission again and explain his situation to a supervisor.