No, it’s not “geeking out over Glee”. Gleeking is the official term for “projecting saliva from the submandibular gland upon compression by the tongue”, and it’s what the Xenomorphs did in Alien. Only the Xenos did it with corrosive acid, which made it a lot cooler.
5. Put your fist in your mouth
Often considered by hormonally overdosed guys to be “hot” for obvious reasons, only a select few people can put their entire fist in their mouths. The good news is: that’s not what either mouths or fists were made for, so it’s not a big deal.