Green’s Dictionary of Slang

1. (US prison) pubic hair.

1986

J. Ellroy Silent Terror 66: ‘You talkin' pussy, you talkin' my language! I poked my ten-incher in more Brillo pads than you fuckin' seen!’.

2. (Irish) a sanitary towel.

2001

G. Coughlan Everyday Eng. and Sl. 🌐 Jam Rags (n): sanitary towels aka brillo pads.