"The female equivilent (sic) of Tea Bagging" (according to Wikipedia's entry for "Teabagging" as of 19 March
2009); ergo, the act of pressing ("stamping") the vagina against the mouth or on or around the face (including the top of the
head) of another person, often in a repeated in-and-out motion as in irrumatio. This practice can leave a pattern of viscous moisture on the recipient's face or
head, vaguely reminiscent of a slight trail of
slime a slug would leave were it to travel around someone's face/
head.
Although this term is acknowledged in Wikipedia, it does not seem to be prevalent on the internet at this time.