Kiam Chye
Actually a preserved/salted vegetable. Used to describe crumpled clothes, paper, anything.
Wayang
Originally use is for theatre or performance. A puppet or opera show is called wayang. Commonly used to say someone is always pretending in front of others. He is two-faced and always acts.
Lobang
It means a hole in Malay. But we use it to mean an opportunity, like having a lot of business deals. Totally opposite meaning.