quackgrass
/ˈkwækˌɡræs/
noun
- A common, fast-spreading weed with long, creeping roots that is difficult to remove from lawns and gardens.
- Pulling quackgrass by hand rarely works because the roots break off easily.
- Quackgrass took over the flower bed after just one rainy season.
- The gardener used a special tool to dig out the quackgrass from the lawn.