Definition of jackoff in English:

jackoff

Pronunciation /ˈjakˌôf/ /ˈdʒækˌɔf/

noun

informal US
  • A stupid, irritating, or contemptible person.

    • ‘they're all a bunch of jackoffs!’

Origin

1930s from jack off.

Pronunciation

jackoff

/ˈjakˌôf/ /ˈdʒækˌɔf/