noun: (slang, derogatory) An ugly, unpleasant, or otherwise objectionable person.
noun: (Internet slang) An illustration of a face with a cartoonishly wide, maniacal grin (from a comic drawn by Carlos Ramirez and originally posted on the 4chan community), typically featured in image macros to convey trolling, mockery, or humorous intent.
noun: Alternative letter-case form of trollface [(slang, derogatory) An ugly, unpleasant, or otherwise objectionable person.]