Citations:crotch critter

Noun: "(slang) a sexually transmitted disease, particularly pubic lice"

 * 1993 — Kathleen D. Mullen, Connections for Health, Brown & Benchmark (1993), ISBN 9780697101273, page 335:
 * The presence of these "bugs," "wee beasties," "creepy crawlers," or "crotch critters," as they are called, is highly irritating.
 * 2006 — Matthew Engel, Cheaper Than Therapy, ISBN 9781411631311, page 263:
 * The room gave me the creeps, and I'm sure if I had stayed in it much longer, it would have given me something else, like cooties, or crotch critters or God knows what.
 * 2008 — Kristopher Reisz, Unleashed, Simon Pulse (2008), ISBN 9781416546269, page 21:
 * "Oh. Remember Monday I was complaining about Geneva Jones being in my health class? Wondering why bother since she's already got every crotch critter in the textbook?"
 * 2010 — Ethan Day, Life in Fusion, MLR Press (2010), ISBN 9781608202362, page 212:
 * "Plus you can tell me who's had crotch critters and boob jobs."