Ryan Lochte -- Jeah! Copyright Battle Looming with Compton Rapper

U.S. Olympic hero Ryan Lochte might have an unexpected speed bump on his way to trademarking the phrase "Jeah!" in the form of 90s rap star MC Eiht, who claims the phrase was his long before it was Lochte's.

Eiht tells TMZ he coined the phrase back in 1988 and is insulted to hear Lochte is trying to claim it as his own now. Eiht tells us, "Why try and trademark something his ass didn’t even create? I am mad that he isn’t giving me proper recognition for taking my saying. He is just disrespectful."

The Compton's Most Wanted rapper tells TMZ he's not so much concerned about the money as he is the "respect and the truth."

Eiht says he plans on sending a cease and desist letter urging Lochte to stop using his phrase.