expression
small-minded person; person of poor character
Colloquial, mildly derogatory phrase for someone petty, narrow-minded, gossipy, or lacking in character. Often used in casual criticism.
あんなことで怒るなんて、ちっちゃい人間だね。
Getting angry over something like that—what a small-minded person.
人の悪口ばかり言うのは、ちっちゃい人間のすることだ。
Always badmouthing others is what petty people do.