Derek Jeter didn't want his fancy male undies on gay people -- this according to a lawsuit obtained by TMZ Sports ... though Jeter says the allegations are pure BS.
Jeter has been locked in a $30 MILLION legal war with the people behind the Frigo underwear line -- and in new court docs filed in Delaware, the undie people say Jeter was not cool marketing the skivvies to gay people.
"[Jeter] demanded that [Frigo] not market to the gay community and states that he did not want the Frigo brand to be 'too gay.'"
The underwear company claims it had a deal with Jeter in which he would serve as a director of the company and do major publicity events -- but Jeter backed out, in part due to the marketing strategy.
In the new docs, the company also claims Jeter demanded the company ditch efforts to make the undies "sporty" because he thought it would harm his relationship with Nike.
We reached out to Jeter -- who says the allegations are "categorically false" and says he's disgusted by the accusations.
Frigo attorney, Joseph Tacopina, tells TMZ, "As demonstrated in the Verified Counterclaims of RevolutionWear filed yesterday, Derek Jeter defrauded RevolutionWear, blatantly breached the fiduciary duties he owed to it and utterly failed to perform his contract with the company. According to RevolutionWear, Jeter's misconduct caused the company to incur losses of at least $30 million, which the company is seeking as damages in this suit, along with punitive damages for his fraudulent conduct. We look forward to cross-examining Jeter and his representatives under oath to expose his alleged frauds to the public. We also have numerous witnesses who are waiting for their chance to testify about his alleged frauds and misconduct."