cut loose

cut loose  {v.}

1. To free from ties or connections, cut the fastenings of.

The thief hastily cut the boat loose from its anchor.

Compare: LET LOOSE (1a).

2.  {informal}

To break away from control; get away and be free.

The boy left home and cut loose from his parents' control.

3.  {informal}

To behave freely or wildly.

The men had come to the convention to have a good time, and they really cut loose.

When he got the news of his job promotion, Jack cut loose with a loud "Yippee!"

Compare: LET GO (6).