His bark is worse than his bite.奴は見掛け倒しだ。
http://www.youtube.com/watch?v=p7LMA11GVmM 31:53 her bark is much worse than her bite
http://www.youtube.com/watch?v=lNg50CIvrjs 1:33 often accused of having a bark but very little bites. 指導するだけで罰則を課したりしない金融監督の立場にある役人達