A small person that is so light that you can just throw them all over the place, like a rag doll.
No Rag Nut, I'm not going to throw you on the roof.
When you are in the Military, and a Non-commissioned officer (AKA - crusty-ass corporal) Decides to fuck with you Drill hat style. He also hates your life because you are a Junior enlisted and don't rate.
"Hey Rag Nut, why the fuck didn't you give the proper greeting of the day. So fuck me right? Go take a lap and find your common curtsies. Don't come back until you do"