hud

noun1

1. •
   (dialect, UK) A huck or hull, as of a nut.

   • Almondes[…]blanched or made cleane from their skinnes or huddes. — 1578

noun1

1. •
   Acronym of head-up display.

   • An explosion just made us an exit! I'll mark it on your HUD, Chief, go! — 2007

phrase1

1. •
   (Internet) Initialism of how you doing.