stand on one's head

Meanings:

• 1.

  United KingdomUnited Statesgeneralneutral
  • To perform a headstand; to support the body upright on the head.

• 2.

  United KingdomUnited Statesgeneralinformalneutral
  • To make an extraordinary or strenuous effort; to do something unusual or extreme in order to achieve a result or to please someone.