A somewhat baseless argument that seems to exist primarily for the sake of arguing. The argument often takes on a life of its own, changing in scope and focus in order to sustain the continuous argument.
Every time those two start talking about literally anything a thargument is going to ensue.
A frivolous argument, sometimes seemingly started just for the sake of arguing. Tharguments often expand in scope and change topic while continuing to be brain numbing and annoying.
I swear if he starts another thargument over this I am going to lose my mind.
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.