Face-forearm - You're so frustrated and embarrassed you use your forearm to

You're so frustrated and embarrassed you use your forearm to hit your face like it's a personal attack.

When I failed my math test and had to show it to my class. Face-forearm. #mathisdead

I told my crush I liked him and he told me he was already taken. Face-forearm. #crushfail

My mom called me 'Sir Fluffy' in front of my friends. Face-forearm. #sirfluffy