Kanye West just pulled out the big guns -- getting support from mega music mogul Irving Azoff ... who's calling Jimmy Kimmel "a joke" ... for spoofing Kanye.
Azoff stepped in the middle of the Twitter war today by posting a couple of tweets -- one informed Kimmel that "@kanyewest kicked your ass."
Then again ... nobody's bigger than Irving ... who, if you don't know, has managed The Eagles, Christina Aguilera, Journey, Fleetwood Mac, Morrissey -- to name a few.
Azoff added another shot at Kimmel ... basically calling him small-time.
By the way, Azoff and Kanye have a clear connection -- Irving is tight with the Kardashians. He even hosted Khloe and Lamar's wedding at his Bev Hills mansion.
@jimmykimmel your low blow comment was uncalled for and shows that you still don’t understand the big time.— Irving Azoff (@irvingazoff) September 27, 2013
Jimmy, time to get on the phone. Matt Damon?