Lisa Lampanelli -- Arsenio Hall's 'Apprentice' Outburst Turned VIOLENT Behind the Scenes

Lisa Lampanelli insists Arsenio Hall's foulmouthed tirade on "Celebrity Apprentice" last weekend was WAY worse behind the scenes -- claiming Arsenio called Aubrey O'Day the c-word ... and even got violent.

Lisa called in to Broadminded on XM Sirius Stars Thursday -- and according to the comedian, the worst parts of Arsenio's anti-Aubrey outburst were edited out ... when he called Aubrey a "c***" and said, he would "something something all over her face."

You'll recall ... the parts that did make it to air included Arsenio in the War Room, saying, "I Googled [Aubrey] and a naked picture with a gut popped up ... f**k her!" (below)

But Lisa says what was edited out sounded so "violent" -- she jumped up and alerted producers, claiming it was the first time in 20 years she had been so shaken up.