A short-hand term for "Casual". Meaning can be used for almost anything, including very chill instances, awkward instances, and other miscellanious instances involving dismal and/or jocund nonchalance.
"Dude, that substitute teacher was so caszhe, she let us write obseneties on the board!"
"That convo was quite caszhe, all it was was, hey whats up, nm hbu, ehh nm, well bye! yah see yah."