the invluntary action of screaming at every blade of grass you see. also, a fun game to play in the car with your parents or friends.
Jeffy - "Hey Billy look, a blade of grass!"
Billy - "AHHAHHHHHHGHAHHHHHHHHAAAHHHHHHHH"
Jeffy - "Wow, you have got to get that grasscreamanitis checked out"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."