four wheeled wives 

Noun, plural: Women who are only ever seen in their chelsea tractors.
Works best when pronounced in the 'Jonathon Woss' estuarine english style so it sounds like an Essex person trying to say 'four-wheel-drives'.

So many four wheeled wives that I couldn't get my ambulance into the playground and the kid died.

four wheeled wives by McCririck's unlucky Laundress October 2, 2005