She's known as the judge who screams and hollers on So You Think You Can Dance.

Now, bubbly judge Mary Murphy is being called a "desperate, cocaine-fueled nymphomaniac" in a just-filed lawsuit by her ex-manager.

The bombshell lawsuit claims Murphy had "many inappropriate sexual relationships" with "questionable men" including members of the TV show's crew.

Her ex-manager, Michael Sanchez, also accuses her of "self-absorbed, childish...behavior" and says she allegedly demanded alcohol disguised in a cup to drink during tapings of the Fox reality show.

Her lawyer denies the sensational claims being made in the lawsuit, calling them "libelous remarks and allegations."