Just set the grass on fire. That will naturally edge it for you.
DISCLAIMER: If you burn down the neighborhood, don't blame me. -- "Fascism should more properly be called corporatism because it is the merger of state and corporate power." -- Benito Mussolini
Some (most) HOA do not allow burning of grass. Not as much any more but it was quite common to burn off the dead bermuda lawn in the winter to dethatch them in AZ.
