I work mostly in enterprise backend so variable names are typically boring, but I have never heard of emojis being used in var names.
I could be wrong there, but I don't think I am.
That being said, the poop emoji would be great to use instead of "temp"
Emojis combine the best of both worlds. Like the letters used in math they are easy to parse and it's really easy to find other occurrences of the same var when the name is an apple . But like the more verbose names in programming languages they can carry meaning. Eg I use the dango emoji for arrays and the monitor emoji for window instances.
Personally I prefer the abbreviation arrr, or sometimes yarr. Lets anyone reading the code feel like they just downed a pitcher of grog.
!Arrrr[g]
Pancakes for a stack, popcorn for a heap, burrito for a monad.
https://twitter.com/ChrisRackauckas/status/10064014612263321...