Country Dictionary

shimming

using your fingers to make a woman feel tighter

Ya, she is loose as hell, so I've just been shimming it.

shimmable

a girl that is really loose but hot, so you would need to "shim" her vagina with your fingers to create "friction" while having intercourse.

damn, shes hot."......"I heard she's so loose you can't even go""......"that's alright, with an ass like that, It's shimmable!