make heads or tails (out) of (someone or something)

(redirected from make heads or tails out of)

make heads or tails (out) of (someone or something)

To understand someone or something. This phrase is usually used in the negative to convey the opposite. After spending hours working with the new piece of software, I still could not make heads or tails out of it. I can't make heads or tails of that new guy in accounting. Sometimes, he's really friendly, and then other times he acts like he's never met me before.
See also: head, make, of, tail