fill one's boots

Meanings:

• 1.

  UKIrelandAustraliaNew Zealandinformalcolloquial
  • To eat heartily or greedily.

• 2.

  chiefly BritishIrelandAustraliainformalidiomaticcolloquial
  • To take full advantage of an opportunity, to indulge oneself freely, or to perform energetically and to the fullest extent.