Devious, plotting, planning, scheming, devilish, underhanded, sneaky, angry, mean, mad, villain, villainous, jealous, spiteful, spite, envy, envious smiley/emote/emoticon
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)