When a man is fucking a girl, he pulls out and cums all up in her pubic hair. Then the man rubs it in and makes her leave it there. When it dries and hardens, the bitch now has a lumpy rug.
"I started to go down on this hoe, but when I tried to run my fingers through her pubes, she had the nastiest lumpy rug!"
Pubic hair that has bumps , most likely herpes or some other form of STD.
I went down on her and she had a lumpy rug! She must get around!