The name for cotton remnants that become wedged in your anal crevasse after wearing boxer shorts, or some other sort of undergarment.
Bob: "Why are you taking so long in there? I gots to make some clay!"
Jeff: " I'll be another few minutes, my Joe Boxers left a 10-footer of flerf in my ass!"
Jeff: " I'll be another few minutes, my Joe Boxers left a 10-footer of flerf in my ass!"
by Gnarltar August 08, 2009