tip-off [ tip] ′ôf′
noun the act of tipping off a tip; confidential disclosure, hint, or warning Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun Informal A piece of confidential, advance, or inside information. An indication of an otherwise unknown fact or probability: The judge called for a pitcher of water, a tip-off that the session would be long.
An act of starting play at the beginning of a period with a jump ball. Also called
tap-off. Origin: tip 3 + (kick)off. The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. tip-off - Phrases/Idioms
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] The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.