Definition of coco-grass in US English:

coco-grass

noun

Southern, US, Regional
  • Any of several tall sedges; especially nut grass, Cyperus rotundus, native to Africa and parts of (chiefly southern) Europe and Asia, now widespread elsewhere as an invasive weed, and (less commonly) Scirpus robustus, a wetland sedge native to North America.

Origin

Mid 19th century.