Wiktionary
borstal training
n. (context British legal English) The official term for the sentencing of young offenders to a special prison.
Usage examples of "borstal training".
Sharp spell of Borstal training to teach you the mysteries of housebreaking, and then a steady life in the Nick.
Again, no youthful prisoner under twenty-one years of age, no matter how bad his record, is allowed the benefit of Borstal training unless he, too, be sound in mind and body.