A stank ho's patch of pubic hair. Referring to the probable existence of "crabs" or pubic lice (Pthirus pubis) residing therein.
Man, I was rollin' in that bitch's crab grass last week and got eat-up with those little fuckers.
by dandi December 19, 2003

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Top Definition
1) a woman's bush begrudgingly offered, knowing that she will be able to use the favor to her advantage at a later time; i.e., a crabby female who allows playing in her pubic grass now as a sacifice for a later advantage

2) a woman's pubes loaded with crabs
Damn I was horny, but the ole lady was in a pissy mood so I refused the crab grass knowing that if I played today, I would be paying tomorrow.
by pornhorn50 January 13, 2010

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1) a woman's bush begrudgingly offered, knowing that she will be able to use the favor to her advantage at a later time; i.e., a crabby female who allows playing in her grass now as a sacifice for a later advantage

2) a woman's pubes loaded with crabs
Damn I was horny, but the ole lady was in a pissy mood so I refused the crabgrass knowing that if I played today, I would be paying tomorrow.
by pornhorn50 January 12, 2010

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when a guy has sex with a girl from behind a few days after shaving his pubes. leaving her Butt itchy for a few days... just like sittin on freshly cut crabgrass
remember that dyme wit the fat booty??? well i totally crabgrassed her last night.

yo man.. see that girl rubbin up against the wall??? dats my crabgrass!
by rafrajam May 26, 2010

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Community action with a mob sentiment that ignores reasonable discussion in favor of preconceived notions.

It is the opposite of astroturf, in which organizations create public statements and falsely attribute them to members of the public, or pose as a member of the public when making the statements to give the appearance of grassroots approval or support for the organization or its actions.
That AT&T blocked images from 4chan because of its content may just be crabgrass. That they blocked it only because of a network problem may be astroturf.
by ITBG July 27, 2009

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