丢三落四 (diū sān là sì) — forgetful, scatterbrained, absent-minded (especially about daily items)

Definition

Examples

• 他总是丢三落四，不是忘带钱包就是忘带钥匙。
  Tā zǒng shì diū sān là sì, bú shì wàng dài qián bāo jiù shì wàng dài yào shi.
  He's always scatterbrained — either forgetting his wallet or his keys.
• 你做事别这么丢三落四，要细心一点。
  Nǐ zuò shì bié zhè me diū sān là sì, yào xì xīn yì diǎn.
  Don't be so careless when you do things; be a bit more attentive.
• 他最近工作太忙，变得丢三落四了。
  Tā zuì jìn gōng zuò tài máng, biàn de diū sān là sì le.
  He's been so busy at work lately that he's become forgetful.