2 sentences for 得意 (dé​yì — complacent)

1. 你别得意，咱们走着瞧！

   nǐ bié dé​yì, zán​men zǒu​zhe​qiáo!

   Don't be so smug; we'll just wait and see!

   Source: Dong Chinese Dictionary

2. 稍微取得一点进步就开始得意，很难有大成就。

   shāo​wēi qǔ​dé yī​diǎn jìn​bù jiù kāi​shǐ dé​yì, hěn nán yǒu dà chéng​jiù.

   It is hard to achieve great success if one becomes conceited after making just a little progress.

   Source: Dong Chinese Dictionary