look like a bomb's hit it字面意思看起来像是炸弹击中了它，引申为（非正式）（地方）脏乱不堪。

【例句】
My bedroom looked like a bomb had hit it.
我的卧室凌乱不堪。

He never tidies up the house, and now his bedroom looked like a bomb had hit it.
他从来不会收拾房子，现在他的卧室脏乱不堪。