Meanings of hang slackly in English

His mouth hung slackly open; the inner membranes had gone dry.

His hands hung slackly at his sides, which made his frantic and spasmodic capering seem especially eerie.

It was barely audible, yet it stopped them dead, so that they stood paralyzed on the trail with their jaws hanging slackly.

The knob hung slackly from the door, as if the last shred of the house's spirit had finally fled, leaving behind only broken bones.

His shoulders were bent, his clothes hung slackly on his powerful frame, and Featherstone thought his hair had grown whiter since he saw him last.