こしぬ 腰抜かす Show inflections LinksSentence search for 腰抜かすSentence search for こしぬかすKanji details for 腰 and 抜Edit in JMdict Godan verb with 'su' ending1. to dislocate one's backSee also 腰を抜かすGodan verb with 'su' ending2. to be unable to stand up due to fear or surprise; to lose one's legs Discussions Log in to talk about this word.