New word courtesy of Ben.
Snufflebug \SNUH-ful-buhg\, noun,verb: To Steal covers from another person with whom you are sharing a blanket with. A person who steals the covers. Use: He tried to snufflebug the blanket but his efforts were in vain.
Snufflebugging The act of stealing a blanket with one swift jerk of movement.
Use: Please stop snufflebugging the covers, I'm getting cold!