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.
(..) She didn't have to work in nobody's kitchen no more. That smells wonderful. And 'cause I was a gozillionaire and I liked doing it so much, I cut that grass for free. But at night-time when there was nothing to do and the house was all empty, I'd always think of Jenny. And then, she was there. (..)1994 Forrest Gump