手ぐすね引く
Idiom- 1to be ready and waiting ; to be on the alert ; to be on the watch Translated by Jiyomi
Other writings and readings
手ぐすねひく手薬煉引く手薬練引く
expressions (phrases, clauses, etc.) · Godan verb with 'ku' ending
JMdict entry 2121110. Source and licence.