show up

show up  {v.}
1. To make known the real truth about (someone).
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 put a chemical on the paper, and the fingertips showed up.
This test shows up your weaknesses in arithmetic.
3.  {informal}
To come; appear.
We had agreed to meet at the gym, but Larry didn't show up.
Only five students showed up for the class meeting.
Compare: TURN UP (2).
Categories: {informal} {v.}