This is the dialect of Nanyang region. It means don't get clever in there. It's a word for being clever. Allegorical, wear a straw hat wooden top (no hat top) - dew can. It also means you can't pretend to be capable.
The literal meaning of exposure is to show that you can, intentionally show that you can, that is, you can't, but play clever, saying that a person's exposure is ironic that he is not really able.