The lines one gets from laying on a low thread-count blanket for too long. Can also be found upon waking up. Often sighted on the legs, arms, or chest.
After our picnic, we lay on the blanket for hours. Upon getting up, we were both covered in blanket hickeys.
The violent thoughts and feelings you get when a Parent pulls the covers off of you in the morning hoping to wake you up. Most commonly used by Mothers on school days.
Billy - Dude my Mom gave me the worst case of Blanket Rage today. I almost got up and head butted her in the fucking teeth.
John - Bro! My older brother is in Prison for murdering our Mother cause of Blanket Rage!