on the knocker

on the knocker

Going door to door, as to solicit a product, information, or Primarily heard in UK, Australia. When I was just out of college, I had a job on the knocker for a mobile phone provider to get people to switch their plans. We're urging everyone who wants to see this referendum pass to get out on the knocker and spread the word.
See also: knocker, on

on the knocker

1 going from door to door, usually canvassing, buying, or selling. 2 (of payment) immediately; on demand. Australian & New Zealand informal
See also: knocker, on