You don't need to spend money on herbicides to kill your grass. According to the Weekend Gardener, all you need to do is look in your laundry closet for some bleach. The household cleaner will kill any unwanted grass. Not only will bleach kill grass, but it will also kill weeds or anything else growing around the area that's being sprayed. According to This Garden is Illegal, bleach is an inexpensive way to get rid of just about anything growing outside.
Put on a pair of rubber gloves and mix 2 cups of bleach with 3/4 cup of water in a 1 gallon bucket. Gently swirl the contents in the bucket to mix them.
Remove the sprayer from the spray bottle and pour the bleach mixture into the bottle, using a funnel to avoid spills. According to This Garden is Illegal, fill the bottle three-quarters of the way to the top to avoid leakage. Screw the sprayer on tightly.
Turn the spray bottle nozzle to a mist and coat the grass you want to kill with the bleach mixture. Avoid spraying surrounding plants.
Watch the progress of the grass that was sprayed. Re-spray any area until the grass begins to die. The Weekend Gardener says the bleach mixture takes about two days to kill grass after application.