a digital pundit; someone who likes to go online and offer opinions on everything on sites that encourage viewers to offer such feedback; the accumulation of all this material is called reviewage.
Every time he goes online, he likes to leave his opinion on whatever he reads or sees, even when he doesn't really know what he's talking about; he's the biggest digidit I know.
The belief that you only need half of the proposed time to finish an assignment due to stress from the upcoming deadline.
"Have you started on your essay yet?"
"No"
But it is due in 4 hours, and the description says it takes 5 hours to write!"
"No worries, I'll just follow the Dimidium Principle, and cut it down to 2,5 hours"
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.