Source : Webster's Revised Unabridged Dictionary (1913)

Rile \Rile\ (r[imac]l), v. t. [imp. & p. p. {Riled} (r[imac]ld);
   p. pr. & vb. n. {Riling}.] [See {Roil}.]
   1. To render turbid or muddy; to stir up; to roil.

   2. To stir up in feelings; to make angry; to vex.

   Note: In both senses provincial in England and colloquial in
         the United States.

Source : WordNet®

riled
     adj : aroused to impatience or anger; "made an irritated gesture";
           "feeling nettled from the constant teasing"; "peeved
           about being left out"; "felt really pissed at her
           snootiness"; "riled no end by his lies"; "roiled by the
           delay" [syn: {annoyed}, {irritated}, {miffed}, {nettled},
            {peeved}, {pissed}, {pissed off}, {roiled}, {steamed},
            {stunng}]