Knock off and Play it by ear

Knock off verb - To bring (as an action or operation) to an immediate end.

Play it by ear and knock off are semantically related. In some cases you can use "Play it by ear" instead a verb "Knock off".

Play it by ear verb - Decide on one's actions as one goes along, depending on the situation.

Knock off and play it by ear are semantically related. Sometimes you can use "Knock off" instead a verb phrase "Play it by ear".