眉に唾を塗る
Idiom- 1to keep one's wit about one ; to be on one's guard ; to be wary ; to keep on one's toes Translated by Jiyomi
Other writings and readings
眉に唾をぬる
expressions (phrases, clauses, etc.) · Godan verb with 'ru' ending
JMdict entry 2670250. Source and licence.