Grey bush 

Reference to the pubic area of a middle aged woman, as encountered by younger male. Almost synonymous with cougar.

The young weary traveler sitting at a hotel bar near the end of the night, with no young tail in sight, threw in the towel and decided to smash some grey bush.

Grey bush by Comm4nd3r April 13, 2011

granny grey bush 

Typically a "cougar" aged female that has a large patch of unkept grey pubic hairs.

Time to wax the ol'granny grey bush.

granny grey bush by robyn ya'blind December 28, 2011