
They only eat GRASS.
Game of Thrones Season 2, Episode 9

they say there are fields of ghost GRASS
Game of Thrones Season 1, Episode 2

Put artificial GRASS in my backyard,
The Big Bang Theory Season 10, Episode 22

Khaleesi of the Great Grass Sea,
Game of Thrones Season 3, Episode 7

Grass is always greener?
The Big Bang Theory Season 8, Episode 18