Often used when someone doesn't wash their "sensitive" areas down below. The thing that was once a precious 'flower' has now turned into a nasty Snatch. For women who use their nasty snatches in unforgivable amounts of promiscuous sexual acts with multiple partners. Often contaminated with Sexually Transmitted Diseases such as Chlamydia, gonorrhea, and HIV.
Edwin: Matt, bro If I were you, I wouldn't try hitting that Nasty Snatch Sami Jo. That's girls Vagina is like a Freight Train. It's been through everything and Everyone without no sign of stopping.