(US, dated) Do not permit yourself to be cheated or duped; do not be naive.

(idiomatic) To lose one's concentration on what is most important.

(idiomatic) Diversity is essential: the world would be incomplete if everyone were alike; an expression of surprise at a person or people's eccentricity.

Alternative form of take a leaf out of someone's book

(idiomatic, derogatory, colloquial) Used to tell someone to go away, or that their request will not be met.

(figuratively) To cease participating in an activity that has turned to one's disadvantage, especially out of spite, or in a way that prevents others from participating as well.

Alternative form of let nature take its course

Alternative form of let nature take its course

Alternative form of let nature take its course

Alternative form of let nature take its course