1-to be denied access to the vagina
2- the female equivalent of the term "cock-block"

root words are:

ban, as in banned

(ex. you are banned from this establishment)

vagina, (specifically the suffix of the word, "gina") the female sex organ (orifice in which " things" are put into and come out of)
(ex. madame your vagina appears to have taken on the appearance of a camel toe in those thighs of yours.)