When two male partners (of the gay sexuality) "pull-out" after they have "filled the mower with gas", start to whip their penises in a circular motion. One partner going clockwise, the other counter-clockwise, and end up cumming on each other when they meet in the middle. In this production, please don't wear protection... It ruins the moment.
Thomas: Garry, you look super hot! Let's do the reversed lawnmower!
Garry: Okay, come plow me babe!
Thomas: Okay! My cheeks are spread!
Garry: Prepare for decimation!
by Emily Unicorntalon & Ty-Ty<3 August 08, 2014
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Jeans with holes and tears in them. It looks like they were run over by a lawnmower.
Guy: Were your jeans attacked by a lawnmower?

Wearer: No, I bought them like this. They are lawnmower jeans.
by Creepy Butters April 10, 2007
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The usage of one's teeth to cut or trim a sexual partner's pubic hairs.
"Vanessa complained of my excess pubic hairs so i asked her to perform the ivory lawnmower on me"

Ivory=Teeth
Lawnmower=Act of trimming ones pubic hairs
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Lawnmower parents try to pre-empt problems and 'mow them down' for their children before they occur and ensure flat surfaces are available for them to traverse...
Oh dear, Mouche is such a lawnmower parent, she just poisoned little lunch for all the children due to compete in next weeks spelling bee...
by mikemilligan2015 December 12, 2015
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to take a dump onto a person's pubic region and then shave their pubic hair whilst the poo is still in it.
Ryan did a boston lawnmower on melissa and now she's all clean shaven.
by profparnham September 26, 2007
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when someone believes their "ass is grass" because of a certain someone, that person is then known to have a lawnmower.
alex - if pete finds out i ragged his girlf before him, my ass is grass, and he's got a lawnmower, ya dig?

brian - straight up nigger!
by aslan. July 24, 2008
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