Definition of on the bum in English:

on the bum

phrase

North American
informal
  • Travelling rough and with no fixed home; vagrant.

    ‘he continued to travel the country on the bum’
    • ‘The post-industrial label will not only appeal to Gen Xers on the bum, it also informs them this premium malt liquor was brewed for almost an entire month.’
    • ‘His boiler it was leaking, and its drivers on the bum…’