put a stop to

a short drop and a sudden stop

A fall to one's death by hanging.

couldn't stop a pig in a passage

To be bow-legged.

face that would stop a clock

A shockingly unattractive face.

not to put too fine a point on it

Used to apologize for a possibly impolite statement one is making; to put it bluntly; to express it in plain terms.

put a band-aid on a bullet wound

To inadequately treat a serious situation.

put a blanket over

Make (something) seem less serious.

put a bug in someone's ear

To make a small suggestion or give a hint that causes the listener to act.

put a damper on

To stop people from enjoying an activity.