seals, moose's, bees (in their heads), cows, sheep, dogs, alligators, horses, small rodents, the mentally disabled, dragons, unicorns, pigeons, old doors, rabbits, dolphins, various bacteria, insects, brick houses made before 1983, brooms, noses, frogs, some windows but not all, computers, Chris, Jesus, baby moles when the moon is full and telephone poles (maaaah)
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.