What does "a bunch of bull" mean? and its origin?

Posted by Willy on July 18, 2003

is it an american slang, meaning nonsense?

"A bunch of bull" R. Berg 07/18/03
- "A bunch of bull" James Briggs 07/18/03
  - "A bunch of bull" al 07/18/03
    - "A bunch of bull" R. Berg 07/18/03
      - "A bunch of bull" just curious 07/19/03
        
        Two "bulls" R. Berg 07/19/03
      - "A bunch of bull" just curious 07/19/03