Definition of don't I know it! in English:

don't I know it!


  • Used as an expression of rueful assent or agreement.

    ‘‘You know how kids tease other kids with unusual names.’ ‘Oh, don't I know it! Try having to grow up with the name Jasper!’’
    ‘‘He's not the most forgiving person.’ Ryan laughed bitterly. ‘God, don't I know it.’’