uninhibited

1. ADJ If you describe a person or their behaviour as uninhibited, you mean that they express their opinions and feelings openly, and behave as they want to, without worrying what other people think. 不受约束的

...a bold and uninhibited entertainer. …一位大胆且豪放不羁的艺人。

The dancing is uninhibited and as frenzied as an aerobics class. 跳舞都放开了，像健身课那样尽情。