Have you seen any moves or looks where a UFC fighter accidentally and unknowingly reveals his intentions? tell n. A reflexive, often habitual behavior, especially one occurring in a context that often features attempts at deception by persons under psychological stress (such as a poker game or police interrogation), that reveals information that the person exhibiting the behavior is attempting to withhold. * Matt Brown, for example, and probably more than any UFC fighter, gets a really animated face just before he goes ballistic. It's kind of funny. * Chuck Liddell used to have a tell, too. (No surprise; there are famous gifs of his emotional reactions.) Who else?