english
1
general::
Supply with secret or private information; also, warn or alert. For example, The broker often tipped her off about stocks about to go down in price, or Somehow they were tipped off and left the country before the police could catch them. [Colloquial; late 1800s]
American Heritage Idioms
2
general::
Phrase(s): tip someone off (about someone or something) [and] tip someone off (on someone or something)
to give someone a valuable piece of news about someone or something. • I tipped the cops off about Max and where he was going to be that night. • I tipped off the mayor about the financial crisis.
McGrawhill's American Idioms And Phrasal Verbs
3
general::
noun ADJ. anonymous | phone VERB + TIP-OFF give sb | get, receive | act on Acting on a tip-off, police raided the house. PREP. ~ about Customs officers had received a tip-off about a shipment of cocaine.
Oxford Collocations Dictionary