DD3's parent's night I (innocently) said I know she'll do her best she's a real grafter. Teacher nods in agreement. DD scarlet and choking in embarrassment.
Apparently it means flirting, totally putting an effort in to impress object of desires! 
A teacher myself I will have to change my repertoire of phrases . Grafting or grafter has always been my go to expression for a hard working pupil who achieves well due to sheer effort rather than a flair for subject.
Who knew? And what else has completely changed meaning that I might shame my DDs and self with?