Me and my friends have this expression called the battleface, it's just simply going up to a talkative person in the class and making the most AGGRESSIVE face you can make followed by a groaning or growling noise while you violently shake your head up and down
you just have to remember to scream out stupid shit like "BATTLE FACE!" or any word that implies combat + face
Once a friend o mine decided to try that to a hot girl talking about some fuckin shopping habits. Well he got nervous

while he was about to scream out "HECTIC FACE" he accidentally shot his disturbing amount of saliva on to that pretty face. I just asked the teacher for a bathroom pass right after that
