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!
by TerriblyAwkward August 22, 2011
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