= to sleep at someone else's house for the night, especially when you have not planned it
这里仅讲解部分意思。
crash verb (ENTER WITHOUT PERMISSION) （未经邀请）擅自闯入（聚会等）-非正式。

【例句】
They crashed on my floor after the party.
聚会后他们在我家打了地铺。
 
We tried to crash the party, but the bouncers wouldn't let us in.
我们想闯进去参加聚会，可是保安拦住了我们。