When you use a very shitty quality of toilet paper on your ass and ithe shit goes through the toilet paper into your finger nails.
by Minolo December 27, 2006
Brown finger nail polish is when you have anal intercourse with someone and your finger nails are brown from... Fudge
by Mermaid_Natalie October 16, 2015
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...
Person 2: ya my bad dawg, I was brown nailing pretty hard so...
by Groundsack101 August 08, 2021