Definitions:
vegetation consisting of typically short plants with long, narrow leaves, growing wild or cultivated on lawns and pasture, and as a fodder crop.

a mainly herbaceous plant with jointed stems and spikes of small wind-pollinated flowers, predominant in grass.

cannabis.

a police informer.

cover (an area of ground) with grass

inform the police of someone's criminal activities or plans

catch and bring (a fish) to the riverbank

knock (someone) down.