meant as an insult, but can be used in many different terms. can describe someone who annoys you, someone you hate/loathe, or even someone who acts like an idiot.
originated from the slut-next-door's boyfriend, when he felt the need to defend his slutty girlfriends actions of sleeping with one guy, then waiting till he was asleep to go outside and suck someone else off, then going home to her boyfriend.
"Johnny is so drunk, he is acting like a dick"
"yeah, he is being a bit of a deeble"