OK I've got two new ones, both happened in a single day.
This student schedules an appointment to meet with me to discuss her recent test. During the meeting, while I am literally in mid sentence, she pulls out her phone and starts texting. Not even like a quick text "just a min", she just sits there and does that goddamn monkey like thumb tapping shit for like a solid 30 seconds.
She finished her text , put it away, and just carried on with the discussion as if nothing happened. I'm pretty sure my jaw dropped for a solid minute and I was unable to respond, other than think "that really just happened? do you have a mental problem?"
Then later in class, I turn to the final slide of the lecture with 5 min left on the clock, thinking great, home stretch. A student looks up and lets out this loud audible sigh. loud, breaking the slience, like a fart in church. And not quick like "sigh, ok, suck it up and take one more note". More like "siiiiggghhhhh, oh my gaaaawwwwd, I cant believe hes doing this to us, when will it be ooovvvverrrrr??"
If these kids are the future we are fucked.