Watchdog
/ˈwɒtʃdɒɡ/
Synonyms
- guardian
- monitor
- supervisor
- overseer
- sentinel
Slang Meanings
A person who is overly protective or critical.
He's such a watchdog about the rules, always checking if everyone is following them.
Someone who keeps a close eye on events or happenings.
She’s a real watchdog when it comes to the neighborhood, always knowing what's going on.