When one's penis remains awkwardly mis-positioned after a night of wet dreaming and thus discharges like a sprinkler during the first tinkle of the day.
I never wipe the floor up after I Water the Lawn and my girlfriend hates it!
While receiving head tape a razor to your partners head and watch as your pubic hair disappears. Then replace the razor with tabasco sauce and feel the buuuuuurn.
Rob: yo bro Denise and I totally did The Spicy Lawn Mower.
Bro: did it hurt?
Its a less racial way of saying there are black people somewhere on your property. We say it when blacks show up at our haunted house. The blacks are usualy the ones that hit our monsters and get all kung foo on that ass when they get scared. So when they show up, a call goes out over the radio that "there's ninjas on the lawn"
I have also used it when there are black ppl around my store. Like when they hang out in the parking lot doing nothing.
I saw a group of black people headed for the entrance to our haunted house, so I alerted the managers that there's ninjas on the lawn.