I remember when we used to say Go Suck a Lemon to people. Shut up, go away, get lost. They were words spoken in anger or disgust. The lemon was unpleasantly tart, leaving one almost speechless. We get the point.
God’s Word employs a similar term, “root of bitterness”. Heb. 12:15 See to it that no one fails to obtain the grace of God; that no root of bitterness springs up and causes trouble, and…