'crash' has several slang meanings.
One meaning is to go to a party that you're not invited to.
For example: NEW YORK (AP) Eating champion Takeru Kobayashi crashed the hot dog eating contest on Coney Island.
Another slang meaning is to sleep at someone's house on a couch or on the floor because you have nowhere to go.
For example: Can I crash here tonight? I don't have any money.
