The act of inserting a string of anal beads into a girl, or guys anus. Once the string is fully inserted with just enough to hold onto hanging out, place your foot on the ass and yank out the string of beads like you are starting a lawnmower. You should hear a sound like a motor trying to start that ends with a scream.
Honey, I could really use the lawnmower.

She said I couldn't make her scream, so I gave her the lawnmower.
by DJ Jones November 17, 2007
When inserting anal beads into your partner slowly, then pulling them out really fast producing the sound of a lawnmower starting.
Alex: Mary can I start you lawnmower?
Mary: NO!
by Mary Roach February 28, 2005
(v.) Overzealously removing anal beads from one's ass, as in pulling the start cord of a lawn mower, which may often times result in the loss of bowel control.
Instead of plopping them out one at a time as one is supposed to as is proper anal bead etiquette, he lawn mowered her corn hole. To which she replied, "Fuck me in the shit!", and so he did.
by jason just January 5, 2005
An alcoholic beverage containing vodka and wheatgrass juice. Invented by Homer Simpson from episode 5F19 of The Simpsons, "When You Dish Upon a Star."
Ron Howard: (sniffing Homer's breath) Do I smell vodka ... and wheatgrass?
Homer: It's called a lawnmower, I invented it, do you want one?
by Cintari May 19, 2008
A sexual manuever in which an individual has his/her partner pull large anal beads out of their ass so fast and hard it looks like they are trying to start a lawnmower.
Why is Allan walking so funny? I guess his girl gave him another lawnmower last night.
by PlayDoc October 25, 2006
When you're so pissed at someone that you bend them over and you put your hand through their legs and grope their whole ballsack and pull it back like you're starting a lawnmower.
Jack took my phone so I couldn't control myself and had to lawnmower him.
by The Chronic Method May 18, 2016
When one pulls out anal beads in the same manner as starting a lawnmower, sternly and quickly. May cause extreme flatus and defication.
Although Travis said, "pull out those beads, but not too fast," Monty gave him the lawnmower. There was p00p all over that d00d.
by the d00d September 24, 2006