[oasisbob]

Is it transitive? As an American I know the word, but rubbish as a verb is utterly unfamiliar.

[afandian]

Yes. "I rubbished his proposal", i.e. "I criticised his proposal".

(I can't imagine what an intransitive 'rubbish' would mean!)

[oasisbob]

Thanks, that makes the parallels with "trash" clear. I could have chosen a better example.