Somebody who loves to get to lessons exactly on time, or in some extreme cases, a little early. Also does all homework that's been set, and more that they've requested from the teacher. Is quite frequently bullied by other students, especially townies, but is too busy trying to please the teacher to notice.
It helps if a keeno is intelligent, but it doesn't matter if they're not.
Bruv: what a fucking keeno
Girl: Uhhh yeah, I'm kinda busy... doing.. stuff.
Boy: Yeah I am always so busy too, with work and all. Where do you work?
Girl: Oh my god, go away you massive keeno.
Essentially someone who is noticeably enthusiastic, sometimes erroneously, sometimes excessively.
Yeah, totally - he just won't stop trying.
He should just chill out and relax, go with the flow.
Yeah, too right. Though sometimes, I wish I'd done more when I had the chance.