If something is gruesome, it is so gross or disturbing that it causes horror within whoever sees it. This could be because of something like a brutal death or murder, disturbing imagery, or something very shocking that you can’t get out of your head.
There was a horrible accident on the freeway, as the victim suffered gruesome injuries to his legs and spine.
by CLEAVRE 2020 August 18, 2022
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An abreviation for great, cool, and awesome.

Mostly used by Goths, in a positive manner.

Goth boy: Hey look at my new hair style.
Goth chick: Gruesome! I love it.
Goth boy: Thank you.
by October_Nocturne January 14, 2008
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A smaller, shrub-like relative of the ugly tree. It shares the ugly tree's ability to trigger ugliness on contact.
Bob looks like he fell out of the ugly tree, hit every branch on the way down and then landed awkwardly in the gruesome bush.
by Cuddles McStig June 20, 2008
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Chad and Jen are a gruesome twosome alright. Inseperable, and insufferable.
by Circushead June 29, 2006
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Two out of control males that are like a car wreck waiting to happen but you can't turn away from. Involved in Shameless self promotion, could care less about what people think, and bring the thunder.
Troy and Dan are the original Gruesome twosome. May have taken a little bit from the Bash Bros, two cory's, and the Hilton's
by clegd July 27, 2009
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Gary popped a gruesome nut last night, and it took him hours to clean up
by dickytwister6969696969 June 14, 2021
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