heads down

heads down

[Sun] Concentrating, usually so heavily and for so long that everything outside the focus area is missed. See also hack mode and larval stage, although this mode is hardly confined to fledgling hackers.
References in classic literature ?
It'll be no use their putting their heads down and saying "Come up again, dear
They hit the pavement, heads down until the gunfire stops.
The players came into the dressing room with their heads down and I told them there's nothing to have your heads down about.
GOING STRONG: Barbaro heads down the stretch at the Kentucky Derby.
If they can't leave, they're going to keep their heads down.
We had to get the cost of the heads down so you could have a head on each surface--so that you didn't have to move the heads from surface to surface, which meant access time.
A foursome heads down a fairway Monday afternoon at the Middlefield Golf Course at Cottage Grove.
18 MIN: Heads down long ball to Carbone, but cannot control return pass.
see [students] just put their heads down and cry because they don't know the answers on the test?
We generally keep our heads down and our noses to the grindstone, so it is very gratifying to look up and realize that our work has received this kind of recognition," said David Mandl, who co-founded the firm with Marvin H.