When you wear a large headband around your waist and her neck as she is giving you oral. The elastic band acts as a rubber band effect, so when she pulls back it forces her back down. Possibly causing her to deep throat.
"So what did you do last night?"
"oh, my girlfriend and I were Head-Banding. She told me she has a sore throat today"
"Sounds like a good time"
The act of studying an extensive amount in one sitting, to the point where one's brain feels like it has gotten bigger from soaking in so much information.
I should study. I think I'm going to go get my head swell on on at the library and hit the books hard so I can crush that western civilization exam that I have tomorrow morning.