fathead

/F AE1 T HH EH0 D/
noun
  1. 1

    An idiot; a fool.

    โ€œYou fathead! You forgot to put the milk in the fridge and now it's spoiled!โ€

  2. 2

    A cyprinid fish of the Mississippi valley, Pimephales promelas, the black-headed minnow.

  3. 3

    A labroid food fish of California; the California sheephead. Semicossyphus pulcher.

  4. 4

    A blobfish, Psychrolutes microporos

  5. 5

    Any of several species of fish of the genus Cubiceps

Source: https://en.wiktionary.org/wiki/fathead