是“I don’t know”的缩写，聊天以及短信里非常常见的简单回复。

释义：我不知道

例句：

It IS a big deal. Who are you texting 50 times a day-IDK (I don't know), my BFF (best friend forever) Jill. 当然有所谓。你每天给谁发50 次短信？ - IDK（我不知道），我的BFF（最好朋友）吉尔。

Did you guys realise the younger Haomei is right-handed, whereas the older one is left-handed Hahaha, Idk why I'm always looking out for these little details.你们有没有发现， 之前的好美是右撇子，长大了的好美是左撇子 哈哈， 不知道为什麽老是喜欢注意这些小细节！

I don't even want to comment, as Durant dunked the next possession and then blocked Russ. Idk how much of this I can take, making me sad af. 我甚至不想评论了，阿杜下个回合就是一个暴扣再送了威少一个帽。我还能承受多少这样的镜头，蓝瘦香菇。

Everyone is energetic this year to celebrate Children's Day. Is it because that the day couple weeks later is the time to say goodbye IDK. However, I know today is not our last Children's Day. 今年的六一童鞋们特积极啊…是因为即将到来的别离么…无论如何，今天不会是我们最后过的一个儿童节！

You've probably seen the great side of mommy while alone with her at tourney.idk

你可能已经在她独自参加比赛的时候见识过了你妈妈伟大的一面.其实我也不清楚？