Maigret
/ˈmeɪɡreɪ/ /ˈmɛɡreɪ/noun
In allusive (frequently ironic ) use denoting: a person engaged in stealthy investigation or psychological deduction.
Origin
1960s. From the name of Commissaire (also Inspector) Maigret, the fictional detective-hero of a series of novels by Georges Simenon, Belgian-born French novelist.