Billy Bob Goes Off Don't Call Me an Actor!

4/8/2009 4:08 PM PDT

Billy Bob Goes Off -- Don't Call Me an Actor!

Billy Bob Thornton transformed into a condescending, pompous jerkwad -- live on the radio today -- when the station DJ casually brought up Billy's acting career.

See, Billy Bob has a band now ... and he demands to be taken seriously -- as in, Billy demanded that the radio host treat him like he would treat Tom Petty. 

Seriously, Billy compared himself to Tom Petty.

It all went down today during a CBC interview -- Jian Ghomeshi, the interviewer, introduced the band -- including a few words about Billy's film career -- which caused Billy to become a massive d-bag for the rest of the interview.

You gotta watch it -- unless you wanna continue to like Billy Bob.

NOTE: The best parts... at the :30 mark, 1:12, 2:36 and pretty much everything between 5:00 - 10:00.