a category of hairstyle popular amongst various contemporary urban countercultures (eg. steam punks, crusties), characterized by erratically shaved areas and inconsistent lengths. often paired with mullet and/or fauxhawk. probably DIYed. looks like it was cut like a lawnmower.
the community bike shop was full of unwashed millennials with lawnmower hair
by annyywayyss November 06, 2017
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When you keep talking after a joke doesn't land or nobody gets a subject, and you keep sputtering nearly nonsensical words until the conversation just dies out. Usually a pretty numbing process.
Dude, stop talking. You're lawnmowering my brain into mush.
by UrbanCarrion July 25, 2019
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a phenomenon resulting when kids come back to school on a monday with haircuts such as buzzcuts, lawnmower cuts, and other unsightly hair cuts. the best way it has been described is that boys get together on the weekends and cut eachothers hair with lawnmowers.
Tina: oh, kevin's hair was so beautiful, but now look at it, it's a square!

Jess: it's atrocious! he must have gone to lawnmower weekend!
by assholeanonymous April 09, 2011
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When a man attaches a razorblade to his penis, and performs a 'helicopter' right above a woman's pubic area (she MUST have a bush for this to work).
Homie 1: "You know Jessica from algebra?"
Homie 2: "Yeah man, rumor is she has never shaved her pubes and has a full-on rainforest in her pants."
Homie 1: "That's no rumor bro, I'm going to her house after school to help her, thinking about giving her an illinois lawnmower."
Homie 2: "Tiiiiight. Hey listen, she's really hot so if the razor slices her leg, can you bring me some of her blood? I'll buy it from you, I just want to put it under my tongue so it gets in my bloodstream."
by Mydickislikeamovie Uncut August 17, 2018
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Someone or Something which is a complete waste of time and effort.
Referring to Italian motorcycle manufacturer Ducati's "desmodromic" valve system, used on high performance motorcycles, which is vastly complicated and would give no observable benefits if integrated into a lawnmower engine.
David you fucking desmodromic lawnmower, for the fifteenth time, get out of my house!

Nah, fixing that shed is like putting Desmodromic Valves on a mower.
by xX_Herbert_McClusky_69_Xx December 28, 2020
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