Fuck Me It's Friday - An expression and acronym that became popular only after the release of the Rebecca Blacksingle, "Friday". The speaker is already aware of the onslaught of references to the aforementioned song they will hear over the course of the day.
Rabbi Kablack: Ugh, FMIF.
Rab Akablak: Yeah, well at least tomorrow is Saturday.
Rebecca Black: And Sunday, comes afterwerrrrrrrrrds.
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.