someone with reckless intentions
what's his problem, why is he acting so strange?
I don't know he is being a little yiggy
verb used to denote a person (or group of people) who act fickle, or balk at a difficult task. Also referred to as "yiggying out" sometimes.
Greg: "Man, where are the other guys? They said they would help me move this rock!"
Rod: "Dude, they totally yiggied out on you.."