The person's hair is very tangled and disheveled, appearing as though a jungle bush has grown on their head.

This couplet vividly paints a picture of someone whose hair is incredibly messy and dishevelled. It describes their hair as being 'tangled and crooked,' making it sound as if a wild, overgrown jungle bush has sprouted right on top of their head. It's a playful yet clear way to say that their hair is in complete disarray, perhaps uncombed or just naturally very unruly, giving them a rather wild or unkempt appearance.