差劲 (chà jìn) — disappointing, no good; (colloquial) lacking strength, vitality, or character

Definition

Examples

• 这部电影真差劲，我看了十分钟就走了。
  Zhè bù diàn yǐng zhēn chà jìn, wǒ kàn le shí fēn zhōng jiù zǒu le.
  This movie was really disappointing; I left after ten minutes.
• 他这个人太差劲了，一点责任感都没有。
  Tā zhè ge rén tài chà jìn le, yì diǎn zé rèn gǎn dōu méi yǒu.
  He's such a disappointing person; he has no sense of responsibility.
• 你们球队今天的表现太差劲了，输得这么惨。
  Nǐ men qiú duì jīn tiān de biǎo xiàn tài chà jìn le, shū dé zhè me cǎn.
  Your team's performance today was really poor — you lost so badly.