The grimmest of the grim.
'Sweet jesus, did you just do a shit on my floor?! Dude, that is GROM!!!'
โดย Mr. Fisherman Beard 14 เมษายน 2013

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Someone that tries super hard to be cool but really is just a fake wanna-be that totally annoys you.
Man that Whitney dude is such a grom, he pissed all over himself after drinking a few Twisted Tea's. I bet he drops grommer's all the time in bars.
โดย Dr. Gromster, M.D. 11 พฤศจิกายน 2009

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short for grommy, a combination of grandma and mommy coined by my 3 year old grandaughter, then shortened finally into "Groms."
Groms, what's you doing?
โดย pheeoz08 09 สิงหาคม 2010

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1: A Marine who was hit in the leg with shrapnel during the Bosnian conflict.

2: The person you should give Sunkist at anytime He/She ever shows up.

3: The person who sniffs your foot to make sure you don't have trench foot, then forces you to drink from his/her pimp chalice.

4: Don Hernando De La Tooth

5: Means Thunder in Polish

6: The hilarious banter that causes you to not pay attention to the proceedings. (see also Grommentary)
"That's a giant ass beetle!"

Grommentary: "somebody knight that thing!"
โดย SlothyWASMachete 28 มิถุนายน 2010

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An annoying young kid. Usually refers to the age range of 8-14.
Hey dude, watch me kick this grom in the throat.
โดย Filthy Sally 03 มิถุนายน 2007

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a wanna be scene kid according to the chavs and sluts but to the 'groms' a new generation below scene kids
'omg your so grommy'

'lolz k behbz'
โดย perksyy 18 สิงหาคม 2011

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Hilariously mangled spelling of "Gorn", the large reptilian alien from the Star Trek television series.

Gorn was first misspelled as "Gorm" in various forum and email messages, which was later further mangled into "Grom".

Fun Fact: Groms is generally considered to be the singular of Groms.
Why'd you choose the Groms?" "Oh, you know, beacuase I like scaley lizards
โดย GromGromGrom 26 พฤษภาคม 2011

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