へっちゃら

Etymology
Shift from.

The gemination may suggest that this was originally an emphatic form; modern dictionaries treat this as essentially a synonym.

First cited to 1952.

Adjective

 * 1)  calm, composed, easygoing, unbothered

Usage notes
Although often translated in ways such as "it's no big deal", the Japanese term describes the mood of a person in relation to a situation or event, rather than the specifics of that situation or event.