捡漏

1. • to repair a leaky roof
2. • to find fault to nitpick

     dialect

3. • to score a bargain (esp. when the seller is unaware of the item's true value)

     slang

4. • to take advantage of an unexpected opportunity

     slang

Character by character

• 捡(jiǎn)pick up
• 漏(lòu)leak