it is a weird and unexplainable peson who does weird acions upon his or herslef without full knowledge that he or she may be watched. . . or had been caught doing something weird. Like an unexplainable person, you can't understand, but you have to just call him weird. . .Instead of calling him weird, you call him/her, Telbi.
"Why did you wave your hands like an idiot?. . . Dude, you're such a Telbi"