cooter butter 

a build up of vaginal secretions/sweat/dead skin in the cooter region

after not bathing for a week, jane had a massive amount of cooter butter build up

cooter butter by teamboo July 25, 2006

Cooter Butter 

A reference to one of the most hilarious forum posts in the history of the internet.

I can't find any lube, here's some butter for your cooter, I put it in the microwave for 8 minutes... cooter butter.

Cooter Butter by tomx569 June 18, 2017