Kentucky Thumb Share definition Flag putting your thumb in a girl's vagina while she is on her period to stop the bleeding My girlfriend wanted to sit on my face last night but she was on her period, so I gave her the Kentucky thumb and ate her ass instead. Kentucky Thumb by drunkfish45 May 20, 2021 0 0 Get merch Get the Kentucky Thumb mug. Buy Now — $32.95 See more merch