Cop out and Cry off

Cop out verb - To break a promise or agreement.

Cry off and cop out are semantically related (British) In some cases you can use "Cry off" instead a verb "Cop out".

Cry off verb - To put an end to (something planned or previously agreed to).

Cop out and cry off are semantically related in back out topic. You can use "Cop out" instead a verb "Cry off", if it concerns topics such as get cold feet.