'Love & Hip Hop's' Nikki & Marcelle -- We Didn't Post Masika 'T.H.O.T.' Billboard!

They hate Masika Tucker for sure, but "Love & Hip Hop" stars Nikki and Marcelle Mudarris swear they did not post that ratchet billboard on the Sunset Strip with Masika's mug shot and the word, "T.H.O.T."

We broke the story ... the owner of Ace of Diamonds is suing the pair for ruining his business by plastering Masika's 10-year-old DUI mug high above the strip, calling her out as a whore.

Nikki and Marcelle's lawyer tells us, they weren't the culprits and they have no idea who did it. The attorney says his clients will fight tooth and nail in court, because they've been wrongly accused.

They're fun.