Green’s Dictionary of Slang

1. (US) a pubescent.

1969		Current Sl. III:3 9: Pubes, n. Adolescent girls (used half-contemptuously of high school females).
1970		L. Bangs in Psychotic Reactions (1988) 36: Some more vivid production which communicated nothing real but suggested everything a fertile pube brain could dredge up!
1999		J. Ridley Love Is a Racket 345: I had no way of knowing what she was to him: daughter, niece, a prepube he found cute ’cause he was a sick bastard.
2001		J. Stahl Plainclothes Naked (2002) 208: He glanced down again to the gaggle of killer pre-pubes that had somehow cropped up alongside the Lincoln.
2015		J. Stahl OG Dad 15: Forgive me, I’m not going to say Baby Mama; it reminds me of pinstriped, barely post-pube Hollyqwood agents who greet each other with ‘Whassup, dawg?’.

2. see pubes n.