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Unsung
Since: Jun, 2016
13th May, 2020 08:09:18 AM
You could add it as one of the Other Stock Phrases, associated with The Informant (and particularly The Stool Pigeon) and/or meeting up with various criminals in the Bad Guy Bar.
eroock
Since: Sep, 2012
13th May, 2020 12:07:55 PM
For details, see here
Is there a trope where a character is looking for a (usually shady) person and after finding them they ask "Are you *Insert name*" and get a response "who's asking" or "depends who wants to know"?