snoop /snuːp/ BrE AmE verb [intransitive]
[ Date: 1800-1900 ; Language: Dutch ; Origin: snoepen 'to buy or eat secretly' ]
to try to find out about someone’s private affairs by secretly looking in their house, examining their possessions etc
snoop around/about
I caught him snooping around in my office.
snoop on
reporters snooping on celebrities
—snoop noun [singular]
—snooper noun [countable]