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1.
pubic hair longer than two inches. can't see the skin. can't find the right hole. squatchy crotch. makes sex difficult and unattractive. lice and ticks inhabit tall grass along with warts, crabs and STD's.
i had to search through my girlfriends tall grass.
i found a tick in my tall grass.

the lice loved the tall grass due to the warmth of it compared to the head.
by andrew104 March 03, 2012
 
2.
The object that blows from the wind, often a tall fat person with acne problems. Some cases have shown that they do not sleep, but masterbate till death.
Chris Ortega was standing there, looking like tallgrass
by They call me FiveHead May 30, 2009