A term used to describe the day approximately three days from yesterday, or, the day after tomorrow. with the word "tomorrow" being takenliterally as "2-morrow" and thremorrow as "3-morrow". other spellings include: 3morrow , threemorrow.
Person A: "What are you doing tomorrow?"
Person B: "Idk, but thremorrow I am going to the skate park."
This is because the 'to' from tomorrow can be read as 'two' as in the number so add 1 and now it's 'three', shorten it and it's 'tre' and stick that in front of morrow and you get the word tremorrow.
you can also up the amount so the day after tremorrow would be fomorrow ect...
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.