Definition of crab-walk in US English:

crab-walk

verb

[no object]North American
  • Move sideways or diagonally, typically in an awkward or furtive manner.

    ‘to climb the stairs one would have to crab-walk past the basin’
    figurative ‘he told reporters the government was crab-walking away from its commitment’

noun

North American
  • A physical exercise in which a person holds their body off the ground with chest facing upward and knees bent and moves around by shifting their hands and feet.

    ‘to conclude the workout we did a circuit of crab walks and low lunges’