There is some doubt over who owns "Who Dat?"
T-shirt makers were hit with cease-and-desist letters from the NFL demanding that they stop selling shirts with the traditional cheer of Saints fans.
The NFL says the shirts infringe on a legal trademark it owns.
Separately, two brothers and longtime Saints fans claim they own the phrase, which was around before the long-downtrodden team's inception in 1966.
NFL, Saints Fans Dispute Ownership Of 'Who Dat'