A sarcastic term for someone's making too big a deal out of something, either by verbosely crowing about it or by asking others to show excessive attention/respect to said trivial matter/object.
So you got an acceptance-letter from the local community-college --- like, wow! --- those enrollment-desperate academic honchos will take just about anyone, so it's really no significant praise or great honor directed your way. Whatcha gonna do with the letter --- frame it and hang it on the wall?!??
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.