"Community" star Chevy Chase BLASTED the show's creator on a SCATHING voice mail for the guy ... telling Dan Harmon he's a "g*dd*mn a-hole" who sucks at writing.
The voice mail is FEROCIOUS ... and according to reports, it's the boiling point in a raging feud that's been going on behind the scenes of the show for months.
During the voice mail, Chase calls Harmon a "g*dd*mn bad writer ... s**t ... stink-o" ... and adds, "Your writing is getting worse and worse."
He also calls Harmon a "fat f**k" who will probably die soon because he eats like crap.
Chase also makes reference to an incident that went down at the show's wrap party, when Harmon allegedly led the crowd in a "F**k You Chevy" chant ... in front of the actor's wife and daughter.
Sources tell TMZ, the rant was extremely awkward for everyone present -- some people joined in, but most people just watched uncomfortably. And Chevy stormed out.
The chant was reportedly in response to Chase walking off the set on one of the final days of shooting.
Sources who work on the show tell us ... "What Dan Harmon did was f**ked up ... Chevy is a pleasure to work with."
We're told ... many people on set feel the "dispute" that took place between the two men during the taping of the season finale was blown out of proportion by Harmon ... because Chevy was "very respectful."
Chevy had an issue with one of the scenes and asked for a rewrite. We're told Chevy was very calm and polite ... but told producers he would "respectfully decline" to participate in the scene unless a change was made.
Producers shot down Chevy's request ... and he quietly left the set without incident.
Our sources tell us they felt the issue had been handled privately because Chevy showed up at the wrap party ... and everyone was shocked when Harmon grabbed the mic and unloaded on the actor.
One source tells us, "What Dan did was embarassing and left a sour taste in all of our mouths ... so low class."
The source adds, "The staff was not pissed at Chevy ... we're pissed at Dan. We all hope Chevy comes back next season."
We're told ... many people on set feel the "dispute" that took place between the two men during the taping of the season finale was blown out of proportion by Harmon ... because Chevy was "very respectful."
Chevy had an issue with one of the scenes and asked for a rewrite. We're told Chevy was very calm and polite ... but told producers he would "respectfully decline" to participate in the scene unless a change was made.
Producers shot down Chevy's request ... and he quietly left the set without incident.
Our sources tell us they felt the issue had been handled privately because Chevy showed up at the wrap party ... and everyone was shocked when Harmon grabbed the mic and unloaded on the actor.
One source tells us, "What Dan did was embarassing and left a sour taste in all of our mouths ... so low class."
The source adds, "The staff was not pissed at Chevy ... we're pissed at Dan. We all hope Chevy comes back next season."
Source: TMZ