grey cells 

used for denoting the brain
its because grey matter is a important part of nervous system

He's got loads of grey cells with an IQ of 160

grey cells by emp3r0r February 23, 2009

Grey Cell Partner 

A partner in making informed and intelligent decisions and/or any venture.

I am discussing this idea with you because I believe you will be a great grey cell partner (in this venture).

Grey Cell Partner by greycellpartner February 22, 2021