(informal) Used as a rhetorical question to confirm agreement, knowing or understanding at the end of a statement.

Synonym of know one's ass from a hole in the ground

Expertise leads to career promotion.

Synonym of know one's ass from a hole in the ground

Alternative form of know one's ass from a hole in the ground

Alternative form of learn to walk before one can run.

If one does not know about a problem or a misdeed, one will not be able to render oneself unhappy by worrying about it; often used to justify not informing an individual about a problem or misdeed.

present participle of know the difference between one's ass and a hole in the ground

What you said is so wrong it reveals you lack basic understanding of the subject or relevant experience.

(idiomatic, colloquial) suddenly, out of the blue.