be not on
UKSomething that is not on is unacceptable and should not happen:
You can't be expected to work for nothing - it's not on.
Thesaurus: synonyms and related words
Not good enough
- beneath
- cop
- deficient
- indefensible
- inexcusable
- lame
- leave
- never
- on
- palm
- palm sb off with sth
- sad
- second-rate
- substandard
- unacceptable
- unacceptably
- unsatisfactory
- unsatisfying
- unsound
- weak
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