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