Josh: Hold on, let me get my boxers. I'm gonna blow
* Josh splooges*
*Josh carries his boxers home with him*
Josh's friend: You like carrying boxer splooge around with you??
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.