shake down

Short definition from Wiktionary

Verb

1. 1
   To cause something to fall down by shaking it, or something it is attached to.
2. 2
   To shake someone so money falls from their pockets.
3. 3
   To extort money from (someone) by means of threats.
4. 4
   To search exhaustively.
5. 5
   To subject something to a shakedown test.

Noun

1. 1
   Alternative spelling of shakedown.