When you scrunch up your lips and the muscles between your
nose and your upper lip to create a shrivelled lip, creating creases that makes it seem like you have two little moustaches/whiskers above your lips.
*resembles somewhat like a
posh troll face without the open mouth
smile.
When you walk up to a friend and you eye contact. You greet each other with the “
moustache face”.
When your friend says
something and you want to be
troll or suggestive, you give them the “moustache face”.