Definition of throw one's hand in in US English:

throw one's hand in

phrase

  • 1Withdraw from a card game, especially poker, because one has a poor hand.

    • ‘He went all in, caught a couple of kings and threw his hand in without showing.’
    1. 1.1 Withdraw from a contest or activity; give up.
      • ‘She will throw her hand in early when the polls show - amongst democrats - she's a Divider, not a Uniter.’