It seems that an LSU professor, Leigh Clemons, wanted to buy a jersey with the name of one of her former students. The student happened to be Randall Gay, a defensive back for the Super Bowl champion New England Patriots. Her attempts were initially rejected. "The NFL Shop website said that they weren't allowed to print 'naughty words' on jerseys," Clemons says, according to Wockner. "I had to call the shop and go through three levels of bureaucracy to get the jersey."
"Clemons said site employees lifted the block on the word 'gay' just long enough for her to place her order then immediately reinstated it," the story said.
From http://outsports.com/nfl/2005/0301nflshop.htm
The article includes a link to the 1100+ words and phrases that are banned for personalized NFL jerseys, including "Lesbian," "Sexy" and "ID TEN T."