くちばかり
kuchibakari

Noun

1. all talk (and no action)

あいつは くちばかりで、誠意 せいいがないね。巧言 こうげん令色 れいしょく すくなし ひとしとはよくいったもんだ。
aitsuwa kuchibakaride sēiga naine. kōgenrēshoku sukunashi jintowa yoku itta monda
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.
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