Superlative form of grassy: most grassy.(adjective)
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Use "grassiest" in a sentence
"Mr. Obama is also taking cover on the grassiest knoll of energy politics, suggesting last week that "illegal activity by traders and speculators" is responsible for the oil run-up."
"In just an hour or so, the airport would play host to some grass-roots politics at its grassiest—a presidential appearance in a key region of a battleground state in an election some think will be too close to call."
"For more than eighteen months, I have been working what friends and colleagues refer to as the "greenest and grassiest" of rooted campaign efforts, i.e. the only time I am not working for Barack Obama's victory is when I am painting."