front bum
noun1
UK, Euphemistic, Slang The vagina or vulva.
- […] you had still started to notice a few changes, a metabolic slowdown that left you wondering whether, on top of being alone for the rest of your life, you were also going to end up with one of those stomachs that could only be described as a “front bum.”2016, Marissa Stapley, Mating for Life: A Novel, Simon & Schuster, →ISBN, page 122: