It sounds like you have done the nice, considerate neighborly thing in asking him to stop or helping him not be such an idiot. You have a few options now....

1. Next time the sprinkler is on and soaking your truck, get in your truck and drive onto his lawn and run over the sprinkler with a tire.

2. Get some 5 minute epoxy and fill up the holes on his sprinkler. If that fails, fill up the hole on the spigot.

3. Since he waters so much, buy a bag of bird seed and spread it around his yard. What the birds don't eat and poop, will come up as a new plant and/or weed. Do it thick enough, the grass will die.

4. Set his lawn on fire so he doesnt have to water anymore.

 

I gotta laugh at that one because it's true. When I had the bird feeder the birds were messy eaters and any seed left uneaten on the ground sprouted real quick. It took months and a few applications of weed-n-feed to get that area of the lawn back to normal.

 

Trying one last attemp of talking to him.
Throw carrot seeds on his lawn look like weeds but can't be killed br weed and feeds lol
Or pin holes in the hose many places and many times lol