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.

Its brutally cold outside this morning so be sure you're Bundled Like Bernie!

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"