verb
- informed on someone; betrayed someone’s secrets or wrongdoing to authorities
- caught rats
Usage: informal
Examples
- He ratted on his friends to avoid punishment.
- The witness ratted out the gang members to the police.
- She felt guilty after she ratted on her classmate for cheating.
- The old barn cat ratted effectively, keeping the grain storage pest-free.
- They ratted the warehouse before storing the food supplies.
- Nobody trusted him after he ratted to the teacher about the prank.