Definitions for upsetting
causing an emotional disturbance
"his disconcerting habit of greeting friends ferociously and strangers charmingly"- Herb Caen; "an upsetting experience"
Kernerman English Learner's Dictionary
making you feel sad and disappointed
an upsetting conversation; It's upsetting to see him so sick.
The action of the verb upset.
That causes or cause upset.
conceited; assuming; as, an upsetting fellow