rat on

1. Betray a comrade by giving information, as in He ratted on his best friend to the police. [Slang; early 1900s]

Related Words

• acknowledge 
• assert 
• blurt out 
• concede 
• confide 
• declare 
• disclose 
• divulge 
• profess 
• prove 
• recognize 
• relate 
• reveal