Jam maker

n.

Heard in Sligo

Someone who got enough points in in their Leaving Cert to take up jam making. (aka: rubbish).

In use

How did you do in your Leaving Cert Millsy?'... 'Enough points to be a jam maker

Posh English

How did you fare with your examinations, Millsy? Sufficiently modest marks to qualify solely for jam making.