Rosie O’Donnell seems to have launched yet another feud via social media.

RadarOnline.com can reveal the comic has brutally ridiculed Jay Leno and fitness trainer Bob Harper over the The Biggest Loser documentary. Article continues below advertisement

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On Tuesday, August 19, O’Donnell, 63, posted an Instagram carousel reacting to Netflix 's docuseries Fit for TV: The Reality of the Biggest Loser.

In her post, she fired at former TV late-night host Leno for how he treated one of the contestants when she appeared on his show.

"Jay Leno is a mean a------ #biggestloserdocumentary," O’Donnell captioned her Instagram post which featured a screengrab of Biggest Loser season 8 contestant Tracey Yukich during a confessi

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