Definitions of tipping
if you tip the police off you give them information to help in preventing or solving a crime
The suspect tipped police off about the location of the body.
if you if you tip an investor off you give them give important, non-public information about a share
Insider trading includes tipping others when you have any sort of nonpublic information.
to give an extra payment in addition to a required payment, usually to express appreciation for service
How much should you tip a waiter, taxi driver or hairdresser?