Definitions by He who knows best

Cozy Boner 

An erection produced from the thought of something extremely comfortable. Specifically, one produced entirely free from sexual thought/arousal. Usually occurs when one is very tired or lacking of sleep.

Dude, I was so tired in Calc 2 today that I started hallucinating about my pillow. Next thing I knew...I had a cozy boner.

Cozy Boner by He who knows best April 28, 2011