ichidan verb, intransitive verb
joke around; act silly; say ridiculous things
Casual, often light-hearted verb for clowning around, making jokes, or acting in a frivolous manner. Can imply not taking things seriously.
See also: ちゃらける
彼はいつも授業中におちゃらけて、先生に怒られる。
He always jokes around during class and gets scolded by the teacher.
真面目な話をしているのに、おちゃらけないでください。
I'm talking seriously, so please don't act silly.