private eye

Etymology
From and its abbreviation, through the homophonic term  in place of "I", and the use of "eye" as a reference to surveillance.

Noun

 * 1)  A private personal detective, employed to gather information about someone.

Translations

 * Czech: soukromé očko, soukromý detektiv
 * Finnish:
 * German: Privatdetektiv,
 * Swedish: