Source : Webster's Revised Unabridged Dictionary (1913)

Upsetting \Up*set"ting\, a.
   Conceited; assuming; as, an upsetting fellow. [Scot.]
   --Jamieson.

Source : WordNet®

upsetting
     See {upset}

upset
     v 1: disturb the balance or stability of; "The hostile talks
          upset the peaceful relations between the two countries"
     2: cause to lose one's composure [syn: {discompose}, {untune},
        {disconcert}, {discomfit}]
     3: move deeply; "This book upset me"; "A troubling thought"
        [syn: {disturb}, {trouble}]
     4: cause to overturn from an upright or normal position; "The
        cat knocked over the flower vase"; "the clumsy customer
        turned over the vase"; "he tumped over his beer" [syn: {overturn},
         {tip over}, {turn over}, {knock over}, {bowl over}, {tump
        over}]
     5: form metals with a swage [syn: {swage}]
     6: defeat suddenly and unexpectedly; "The foreign team upset
        the local team"
     [also: {upsetting}]

upset
     adj 1: afflicted with or marked by anxious uneasiness or trouble or
            grief; "too upset to say anything"; "spent many
            disquieted moments"; "distressed about her son's
            leaving home"; "lapsed into disturbed sleep"; "worried
            parents"; "a worried frown"; "one last worried check
            of the sleeping children" [syn: {disquieted}, {distressed},
             {disturbed}, {worried}]
     2: thrown into a state of disarray or confusion; "troops
        fleeing in broken ranks"; "a confused mass of papers on
        the desk"; "the small disordered room"; "with everything
        so upset" [syn: {broken}, {confused}, {disordered}]
     3: used of an unexpected defeat of a team favored to win; "the
        Bills' upset victory over the Houston Oilers" [syn: {upset(a)}]
     4: mildly physically distressed; "an upset stomach"
     5: having been turned so that the bottom is no longer the
        bottom; "an overturned car"; "the upset pitcher of milk";
        "sat on an upturned bucket" [syn: {overturned}, {upturned}]
     n 1: an unhappy and worried mental state; "there was too much
          anger and disturbance"; "she didn't realize the upset
          she caused me" [syn: {disturbance}, {perturbation}]
     2: the act of disturbing the mind or body; "his carelessness
        could have caused an ecological upset"; "she was
        unprepared for this sudden overthrow of their normal way
        of living" [syn: {derangement}, {overthrow}]
     3: condition in which there is a disturbance of normal
        functioning; "the doctor prescribed some medicine for the
        disorder"; "everyone gets stomach upsets from time to
        time" [syn: {disorder}]
     4: a tool used to thicken or spread (the end of a bar or a
        rivet etc.) by forging or hammering or swaging [syn: {swage}]
     5: the act of upsetting something; "he was badly bruised by the
        upset of his sled at a high speed" [syn: {overturn}, {turnover}]
     6: an improbable and unexpected victory; "the biggest upset
        since David beat Goliath" [syn: {overturn}]
     [also: {upsetting}]

upsetting
     adj : causing an emotional disturbance; "his disconcerting habit
           of greeting friends ferociously and strangers
           charmingly"- Herb Caen; "an upsetting experience" [syn:
            {disconcerting}]