Lorry` SG i was wonderin too .. hate this stupid term and never use it at all .. msn can usually see 'muggin for exams ....' , 'mug mug mug ....'
DrTech SG Probably, I tend to see JC students use it. And I think the trend moved to the secondary school students as well.
Xcert SG pegging to work steadily and diligently -- often used with away cram to study a subject intensively especially for an imminent examination