口ばかり

くちばかり

all talk (and no action)

Contains kanji

Example sentences

あいつは口ばかりで、誠意がないね。巧言令色少なし仁とはよくいったもんだ。

They say fine words are no virtue if they're insincere and that's him in a nutshell. He's all talk but doesn't mean a word of it.

彼はまるで何でも知っているかのような口ぶりだ。

He talks as if he knew everything.

母は台所でせっせと料理しながら歌を口ずさんでいた。

Mother hummed to herself as she went about her cooking in the kitchen.