To joke around or behave flippantly; to speak or act in a teasing, unserious way (colloquial).
彼は酔うとすぐちゃらけるから、注意してね。
He starts joking around as soon as he gets drunk, so be careful.
会議の場でちゃらけるのは失礼だ。
It's rude to clown around during a meeting.
そんなにちゃらけないで、本気で考えてくれ。
Don't joke around so much—think seriously, please.
子どもがちゃらけて先生に叱られた。
The child was scolded by the teacher for fooling around.