Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
tip-off is a noun meaning "inside information that something is going to happen". It carries 2 recorded senses.
inside information that something is going to happen
the act of starting a basketball game with a jump ball
Definitions, synonyms and semantic relations for tip-off come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.