Dic: cut loose, break loose, tear loose

• She cut loose from her sponsors and decided to try to fund herself instead.
• After a few glasses of wine everyone just cut loose and started dancing.

cut loose:

1. if a person or organization cuts loose, they separate themselves from another person or organization (usually + from ).
2. to behave in a way that is free and relaxed, especially when you are enjoying yourself.
   
3. [cf] to behave or express yourself in a free or forceful way.

• As we crossed the lobby, Charlie cut loose with a yell that made everyone stop and stare at us.

break/cut/tear (something) loose from (somebody/something): separate (yourself or somebody/something) from a group of people or their influence, etc

• The organization broke loose from its sponsors.
• He cut himself loose from his family.
• He made it in baseball to the major leagues, but the Sox cut him loose because he could not hit.
• Many workers will be cut loose in the upcoming staff reductions.

cf. ‘사바를 해탈하다’ : be cut loose from the ties of the earth, be delivered from worldly existence

... http://idioms.thefreedictionary.com/cut+loose, OALD(네이버), 능률한영사전(네이버)