What does 'On the knocker' mean?

Meaning 1:

If someone is on the knocker, they are going from house to house trying to buy or sell things or get support.


Meaning 2:

If you do something on the knocker, you do  it immediately or promptly.



Idioms similar to 'On the knocker'


All idioms have been editorially reviewed, and submitted idioms may have been edited for correctness and completeness.

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