quick grass
/ˈkwɪk ɡrɑːs/ /ˈkwɪk ɡras/noun
1Any of several weedy grasses, especially couch grass, Elymus repens.
2 South African. Any of several creeping grasses, especially Cynodon dactylon.
Origin
Early 17th century; earliest use found in John Minsheu (c1559–1627), lexicographer. From quick + grass; perhaps also associated by folk etymology with quick.