Definition of knock something over in US English:

knock something over

phrasal verb

North American
informal
  • Rob a store or similar establishment.

    ‘they knocked over a liquor store’
    • ‘If I'd knocked over a liquor store that day instead of accepting John's offer, I'd have been out of prison and off parole long before now.’
    • ‘If their children develop behavioral disorders at school, drop out, turn to drugs and begin knocking off 7-Elevens—they won't be surprised.’
    • ‘First they're nicking comic books, then knocking off whole banks!’