I agree with Rover on all but the final point. "Dobber" was regularly used when I was at school and we frequently referred to "dobbing someone in". I have been known to use the last phrase more recently too, usually in a joking fashion.
I agree with Rover on all but the final point. "Dobber" was regularly used when I was at school and we frequently referred to "dobbing someone in". I have been known to use the last phrase more recently too, usually in a joking fashion.