If you were up $8,000 and now you are only up $6,000, then you are 'upstuck' $2,000 even if you only entered the game with $4,000. This creates obvious psychological effects to how people play while gambling despite their actual buy in.

phone: why don’t you go to sleep tommy it’s 2 in the morning?
tommy:why don’t you die you dumbazz

person 1: "dude did you see what happened to john last night?"
person 2: "yeah check out the upstuck in the bathroom"
person 3: " woah"