ab grass Share definition Flag The hair on one's stomach. One's "happy trail." Peach fuzz on a woman's tummy. It looks like you have a squirrel crawling out of your belly-button. It's time to mow your ab grass. ab grass by lyonshare April 29, 2009 0 0 Get merch Get the ab grass mug. Buy Now — $32.95 See more merch
