an involunary contraction of the muscles of the vagina during intercourse.
"Elroy thought he wuz about to git his dick pinched off when Linda's muff slamed shut on him."
by J E. Walker May 09, 2003
1 more definition
The thin area of skin between the vagina and the asshole, similar to an isthmus of land
The tide came up and I was stuck on her vaginismus.
by upland game May 10, 2006