The part of the female genitalia that is comprised of the clit and the genital lips. When the lips have been parted, the lady's anatomy is quite like the appearance of an oyster.
Wow! Did you see the oyster on that chick in the movie? She had very large lips. And her oyster was very, very moist!
by The C MONSter August 18, 2007
Get the oyster mug.
Oyster is London’s travel smartcard. You can put your Travelcard or Bus Pass season ticket on it, add travel value (cash) to pay as you go or have a combination of both.

Oyster cards are also reusable. This means that when your ticket expires you can buy another on the same Oyster card, and when your travel value (cash) runs out, you can just top it up.
I used my Oyster to get to work today.
by TintinHerge July 19, 2006
Get the oyster mug.
The mother of a pearl. They are found in salt-water bodies.
I found a precious pearl in an oyster.
by Sandy Jane February 19, 2008
Get the oyster mug.
1. a glob of phlem

2. a blob of semen

3. the female genitals

(from the fact that these things are often slimy like an oyster)
an oyster sat on the middle of sidewalk, much to their disgust.
by The Return of Light Joker January 2, 2010
Get the oyster mug.
Gob of phlegm in the street, also 'Dockyard oyster' from Portsmouth Dockyard.
Mind the road there, you'll tread in that oyster.
by David from Kingsbury August 26, 2007
Get the oyster mug.
Yo man, if i don't get some oysters tonight, i'm gonna flip out.
by Mike September 22, 2006
Get the oyster mug.
Rhyming slang for retard

Oyster = Oyster Card = Retard
Antony, you're a total fucking oyster.

I can't believe how much of an oyster that Antony is.
by Pinko_Commie May 22, 2007
Get the oyster mug.