Crotch Vinegar Share definition Flag A dirty undercarriage on. A man or woman that has taken on some sort of vinegar like smell to it. What is that smell? Grace hasn't showered in 2 days ...she got some crotch vinegar brewing. Crotch Vinegar by Finbag March 12, 2017 0 0 Get merch Get the Crotch Vinegar mug. Buy Now — $32.95 See more merch