1. not self-assured or relaxed 沒有把握的; 無自信的
2. not sophisticated nor worldly-wise 不世故的,不酷,很遜
3. unfashionable and boring 不流行的; 過時的; 無聊的
4. Not in accord with the standards or mores of a specified group 與某群人的道德標準不相符的
1. It is so uncool of him to show up without a present to my birthday party.
2. He is such an uncool guy, not following up to the trend, always wearing outdated clothing and acting like a nerd.