Duhamel is a last name given to a man/woman that is super strong and super smart. Duhamel is the last name of somone that has no fear and has a hot girlfriend/boyfriend.
Girl 1: OMG Look at Tobias Duhamel he is soo hot.
Girl 2: Yeah!! And he's super smart.
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.