Doing a Leanne is a moment in which a person comes across as a pedophile, racist, ageist, disableist when the intentions was not to be.
Did you hear what leanne did the other day?
She told a deaf Store worker to listen to her and didn't notice she was deaf til the store worker started talking like a deaf person
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.