He has never been one to 'let the grass grow under his feet'. [=he has never been slow about doing things; he gets things done quickly]
The young candidate hoped to gather votes at the 'grassroots' level in his own neighborhood.
I'm not ready to be 'put out to grass' [='put out to pasture'] just yet.
(..) -Okay. Take it away, Lady Bird. ♪ Everybody says don't / Everybody says don't / Everybody says don't it isn't right, don't it isn't nice ♪ ♪ Everybody says don't / Everybody says don't / Everybody says don't walk on the grass ♪ ♪ Rolling along! ♪ ♪ Make me a channel of your peace ♪ (..)2017 Lady Bird