Water Stone 

In the Pokemon games, it helps certain Pokemon evolve.

Shellder + Water Stone= Cloyster
Eevee + Water Stone= Vaporeon
Staryu + Water Stone= Starmie

Water Stone by RatchetBoo October 19, 2003

Trying to get water out of a stone 

To try to achieve an impossible outcome or result.

I told Bob that trying to sue the restaurant for being too noisy would be like trying to get water out of a stone.

Trying to get water out of a stone by D. Y. Vetz February 13, 2020

waterstone 

1.to do something spaztically
2.to fluke something and do well against odds
3.someone up-market and upperclass, derived from the up-market bookshop name

"man that girl just did a waterstone"

waterstone by Rosie james March 6, 2007