Значение идиомы show up

[show up] {v.} 1. To make known the real truth about.

The man said he was a mind reader, but he was shown up as a fake.

2.To come or bring out; become or make easy to see.

The detective puta chemical on the paper, and the fingertips showed up.

This testshows up your weaknesses in arithmetic.

3. {informal} To come;appear.

We had agreed to meet at the gym, but Larry didn’t showup.

Only five students showed up for the class meeting.

Compare:TURN UP.