上っ調子 (うわっちょうし) Japanese meaning | KotomoraMeanings
1
na-adjective, noun
flippant; frivolous; shallow
Describes a person or attitude that is thoughtlessly cheerful, lacking seriousness or depth. Often used critically.
上っ調子な性格だから、大事な話は任せられない。
Because of his frivolous nature, I can't entrust important matters to him.
