Inclined to pry into other people's affairs; nosy or inquisitive in an intrusive way. Can also refer to the famous cartoon beagle character.
From the verb 'snoop' meaning to investigate secretly, plus the adjectival suffix '-y.' 'Snoop' itself may come from Dutch 'snoepen' meaning to eat sweets secretly, suggesting secretive behavior.
The cartoon character Snoopy actually embodies the opposite of being snoopy - he's imaginative and dreamy rather than prying. Charles Schulz chose the name because it sounded like a good name for a dog, not because of the adjective's meaning.
Complete word intelligence in one call. Free tier — 50 lookups/day.