gronk
n.— «The work “gronk” does not have its genesis in ethnic youth. I first encountered this term while working as a psychologist in the NSW prison system in the mid-1980s. This term has gained a more widespread usage since then.» —“Teenage Vernacular” by Peter Brala in West Pennant Hills Daily Telegraph (Sydney, Australia) July 4, 2002. (source: Double-Tongued Dictionary)