Citations:grundle

Noun: "(US, slang) the area between anus and scrotum in a male or between anus and vulva in a woman"

 * 2007, "Boy Meets Girl Meets Column", The Chariot (MiraCosta College), Volume 13, Issue 12, 30 April 2007, back page:
 * You can lightly massage his perineum (taint, bonch, grundle, nifkin, whatever it is you kids call it these days), or you can snap on a latex (or nitrile if either of you are allergic to latex) glove and go about two inches in and feel around for something the size of a walnut, and massage gently.
 * 2008, Jazz, A Taste for You, AuthorHouse (2008), ISBN 9781438932484, page 10:
 * I placed a finger, then two, on his grundle for added pleasure.
 * 2009, Terence Fitzgibbons, Assumed the Watch, Moored as Before: An Alternative Naval Officer's Guide, Xlibris (2009), ISBN 9781441567277, page 37:
 * I hit the flush button and I feel the air from the VCHT (vacuum, collection, and holding tank) system pass over my grundle. That one full second of cool air down below is one of the few perks of the day and of the job.
 * 2009, Cate Robertson, "Half-Crown Doxy", in Bitten: Dark Erotic Stories (ed. Susie Bright), Chronicle Books (2009), ISBN 9780811864251, page 126:
 * Lost in his bliss, he doesn't protest when she presses a spit-slicked finger to his grundle, or when she slips it lower, then deeper.