handle oneself
/hˈandəl wɒnsˈɛlf/
/hˈændəl wʌnsˈɛlf/
Synonym discussion
Sense: idiom/1
'Handle oneself' is often used for how someone acts in a tense or public situation. 'Behave' is broader and works in ordinary situations too. 'Conduct oneself' is more formal, while 'compose oneself' focuses on becoming calm again after an emotional moment.
Etymology
English
The phrase combines 'handle' in the sense of managing something with the reflexive pronoun 'oneself'. From the idea of managing yourself, English developed the figurative sense of behaving in a particular way.