Definitions by Groundsack101

brown nailing 

When you are wiping your ass and your finger slips off the paper causing you to scrap your fingernail against your asshole. - hence the name brown nailing

Person 1: hey bro what took you so long in there?
Person 2: ya my bad dawg, I was brown nailing pretty hard so...

brown nailing by Groundsack101 August 8, 2021