Green’s Dictionary of Slang

(US juv) a juvenile court.

1953		Kramer & Karr Teen-Age Gangs 228: The Adolescents’ Court is known among the youths as the ‘lollypop’ or ‘short pants’ court.
1956		‘Vin Packer’ Young and Violent 37: ‘What about that day in lollypop court, boy!’ [...] He is remembering adolescents’ court, the morning he was sentenced.