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 13, 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 19, 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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Five extremely judgmental friends who have an annoying amount of inside jokes. They often exist of one slouchy ginger guy with fluctuating weight, one sassy but trashy brunette, one angry brunette with a Tinder addiction, a high maintenance Asian who's delusional about her sweetness and a flamboyant gay mannequin. Separately, they are super nice but together, they become more evil than the kid from the Omen.
Sandra: 'I hate the gruesome fivesome! They always push and kick me!' Brad: 'I know, but then again: they were right about your hair!'
by GF_POYV November 3, 2014
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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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