stop the bleeding

a short drop and a sudden stop

A fall to one's death by hanging.

bleeding edge

Something too new and untested to be reliable or to have any assurance of safety; the figurative place where such things exist.

couldn't stop a pig in a passage

To be bow-legged.

face that would stop a clock

A shockingly unattractive face.

put a stop to

To terminate or abolish something.

stop a bullet

To be shot; to receive a bullet in one's body.

stop and smell the roses

To relax; to take time out of one's busy schedule to enjoy or appreciate the beauty of life.

stop at nothing

To take any measures to do or achieve something, especially if it involves great risk or danger; to do everything in one's power.