He did a 'half-assed' job.
a 'half-assed' remark
(..) It looks more like a surveillance bird to me. - Pick up the trail yet? - Billy's on it. Heat seeker, Dillon. Pretty sophisticated for a bunch of half-assed mountain boys. I guess they're getting better equipped every day. There were guerrillas. They took the two men from the helicopter, (..)1987 Predator