snooper
/ˈsnuːpər/ · snoo·per
noun
- A person who secretly looks into other people's affairs or private matters. She caught the snooper rummaging through her desk drawers.
- A device or software that covertly monitors or records information. The security team installed a snooper to detect unauthorized network traffic.
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Did you know? The term 'Snooper' was popularized by the 1960s animated TV duo 'Snooper and Blabber', a detective dog who constantly nosed into other characters' business.