heads down: [Sun] adj. Concentrating, usually so heavily and for so long that everything outside the focus area is missed.

Related:

• heads down: [Sun] adj. Concentrating, usually so heavily and for so long that everything outside the focus area is missed.
  See also {hack mode} and {larval stage}, although...
• troglodyte mode: [Rice University] n. Programming with the lights turned off,
  sunglasses on, and the terminal inverted (black on...
• burn-in period: n. 1. A factory test designed to catch systems with {marginal} components before they get out the door;
  the theory is that burn-in will protect customers...
• demo mode: [Sun] n. 1. The state of being {heads down} in order to finish code in time for a {demo},
  usually due yesterday. 2. A mode in which video...
• larval stage: n. Describes a period of monomaniacal concentration on coding apparently passed through by all fledgling hackers.
  Common symptoms include the perpetration of more than...
• hack mode n. 1. What one is in when hacking, of course.
  2. More specifically, a Zen-like state of total focus...
• rare mode: [UNIX] adj. CBREAK mode (character-by-character with interrupts enabled).
  Distinguished from {raw mode} and {cooked mode}...
• maximum Maytag mode: What a {washing machine} or, by extension,
  any hard disk is in when it's being used so heavily...
• priority interrupt: [from the hardware term] n. Describes any stimulus compelling enough to yank one right out of {hack mode}.
  Classically used to describe being dragged away by...