WordNet sense 1 (German writer of novels and poetry and plays (born 1927)):

Gunter Grass, Gunter Wilhelm Grass

WordNet sense 2 (animal food for browsing or grazing):

forage, pasturage, pasture, eatage

WordNet sense 3 (street names for marijuana):

dope, gage, locoweed, pot, skunk, smoke, sens, sess, green goddess, Mary Jane

WordNet sense 4 (cover with grass):

grass over

WordNet sense 5 (give away information about somebody):

betray, denounce, rat, shit, shop, snitch, stag, give away, tell on