"Who Dat may belong to the people again soon enough. The NFL announced Saturday that it has reached a settlement on behalf of itself and the New Orleans Saints with Who Dat?, Inc., a company that had claimed to have trademarked the catchphrase, that dismisses a lawsuit over the use of "Who Dat?" on merchandise.
According to two-sentence press releases issued by the NFL and Who Dat?, Inc., owner Steve Monistere, both have agreed to make merchandise available to fans that contains both the "Who Dat?" and NFL brands. No such merchandise appeared on the NFL's website on Monday, however."