Jack Osbourne fires back at body shamers calling him 'grossly underweight'

Jack Osbourne is done dealing with body shamers.

The 40-year-old media personality took to Instagram to respond to articles body-shaming him for being "grossly underweight" and calling him "sick," saying "I cannot believe I’m having to actually make this f---ing video."

"I have lost no weight since I got out of the jungle doing 'I’m a Celebrity… Get Me Out of Here!' six months ago," he explained. "I’ve been the same f---ng weight. The only difference is I shaved my beard and opted for a creepy mustache.