Answer:
You use a knife to slice my head. And weep beside me when I am dead.
What is full of holes, but can still hold a lot of water?
A kind of weather that comes your way, but add a "D" and it will run away
What can be big, white, dirty and wicked?
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
I am your mother's brother's only brother in law. Who am I?