'Upsetting' definitions:

Definition of 'upsetting'

From: WordNet
adjective
Causing an emotional disturbance; "his disconcerting habit of greeting friends ferociously and strangers charmingly"- Herb Caen; "an upsetting experience" [syn: disconcerting, upsetting]

Definition of 'Upsetting'

From: GCIDE
  • Upsetting \Up*set"ting\, a.
  • 1. Conceited; assuming; as, an upsetting fellow. [Scot.] --Jamieson. [1913 Webster]
  • 2. such as to disturb the self-possession of; unnerving; causing mental distress; as, the sight was an upsetting experience. [PJC]