I heard that phrase for the first time this week, spoken by Melvyn Bragg during a discussion of Justinian Law on a podcast of In Our Time (superb podcasts, btw, for the intellectually curious).
I was able to deduce the meaning from the context, but looked it up for confirmation:
"to react to a difficult problem by doing something to make sure that people will forget about it rather than trying to solve it." The decision to kick the proposals into the long grass could come back to haunt all three party leaders.Embedded photo: the (infamous) fescue at Erin Hills, site of this week's U.S. Open.
Photo credit Joe Robbins/Getty Images.