1
saliva;spit;spittle
吐いた唾は飲めぬ。
A word, once out, flies everywhere.
1
to keep one's wit about one;to be on one's guard;to be wary;to keep on one's toes
See also:
眉に唾をつける (まゆにつばをつける)
Other forms
眉に唾をぬる 【まゆにつばをぬる】