Green’s Dictionary of Slang

1. (US) to hand over money (in the face of blackmail).

1854

Life in Boston & N.Y. (Boston, MA) 13 May n.p.: [He] hreatens to expose them if they do not ‘tip over’ handsomely.

2. (US Und.) to raid; also as n., a police raid.

1929		Hostetter & Beesley It’s a Racket! 240: tip over — To bomb; to close up; to raid; to destroy.
1949		Monteleone Criminal Sl. (rev. edn).
1950		Goldin et al. DAUL 224/1: Tip-over, n. Police raid to break up a disreputable establishment, making no arrests [...] Tip over, v. To rob an establishment or dwelling, especially by burglary; to raid premises, as by the police.

3. (US) to rob.

1949

Monteleone Criminal Sl. (rev. edn).