Critical Grass

1) N-The immeasurable point at which further inhalation of marijuana smoke will no longer get the user more high, and proceeds to only make the user sleepier.
2) N- The immeasurable point at which your lawn mower bag will hold no more grass.

Ex 1. Jimmy is way past critical grass, I bet he's passed out in an hour.
Ex 2. Load another bowl, I'm along way from critical grass.

Festival Grass

Grass that was once living green lawn, but has succumbed to excessive traffic or heat. If you sit on it you get covered in bits of dead grass. Typically found in Australian backyards during summer, and at music festivals.

Three days of 40 degree heat and my backyard is just festival grass.

grass infield

A slang term referring to pubic hair on a female's snatch

If there is grass on the infield play ball.

Man Phyllis is one dirty whore, you would need a brush hog to cut her grass infield.

Grass Mileage

A means of describing the amount of marijuana consumed per hit.

Dude, I'm all for smoking out of the bong, but this bowl gets way better grass mileage.

grass angel

Someone who brings weed to da party

Oh Jeff, you're such a grass angel.

Grass-Button

Grass-Button is a sex position involving four people of any gender combination. It is when there is a chain of four people having intercourse on their knees outside all at the same time. The origin is the grass is because it is outside and the button part is because a button has four holes and four holes are needed for a successful Grass-Button.

Girl: "Hey I feel like having a Grass-Button, any of your friends wanna come join? it has to be multiples of four though!"

Boy: "Of course!! I love a good grass-Button"

grass top

When somebody builds a house in Minecraft out of dirt, and they leave it up for so long the dirt becomes a grass block again. Meaning the roof is a "grass top".

Jamal " Have you seen Emma? She's wearing all leather armor! "
Matt " Yeah, shes such a grass top! "