noun
advanced juvenile training school; special reformatory; juvenile hall for serious offenders
Slang abbreviation of 特別少年院 (special juvenile training school). Refers to a facility for juveniles who have committed serious offenses. Used informally, often in legal or correctional contexts.
See also: 特別少年院
あの少年は特少に送られたらしい。
That boy was apparently sent to a special reformatory.
特少は一般の少年院より厳しいと聞いた。
I heard that the advanced juvenile training school is stricter than ordinary juvenile detention centers.
Abbreviation formed from the first characters of 特別 (tokubetsu, 'special') and 少年院 (shōnen'in, 'juvenile training school').