let oneself go{informal} To be free in one's actions or talk; relax.
Judge Brown let go at the reunion of his old class and had a good time.
The cowboys worked hard all week, but on Saturday night they went to town and let themselves go. Syn.: CUT LOOSE, LET LOOSE(3), LET OFF STEAM(2).
See: LET GO(6).
[TahlilGaran] English Idioms Dictionary ▲