a boy in la jolla who is usually: a surfer, an ass hole, greases their hair back, is friends with a or s, drinks beer, chain smokes, attends la jolla high, WSR, hooks up with a girl and never talks to them again, talks shit about everyone, has blond hair, wears flannels
ew i dont want to hang out with the groms, they will rape us and then talk shit about how we sucked dick at sucking dick
by fuckermothercock November 26, 2008
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If that grom snakes me again, I'll wrap his board round his head.
by hairyBumhole September 24, 2003
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To forcefully grasp, seize or colonize a person, thing, or sexual object.
Here is how grom is commonly defined:

Guy 1: " hey watch should we grom for lunch"
Guy 2: " I dunno I'll grom ur ass"

Part 2:
Guy 1: " oh no I ehGROMulated everywhere"
Lady: "ah crap"
by Poopypoopoo696969 December 19, 2016
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Grom is short for Gromethius the Fearbringer. It is the black goop monster Luz noceda and Amity Blight fight in Enchanting Grom fight (ep 16) of the owl house. Grom will shapeshift into the challengers worst fear to get an edge in combat.
Grom is also sometimes used to refer to ep16 of The Owl House
Grom just shapeshifted into amitys worst fear... Which was being rejected by luz
by AmityNoceda January 27, 2021
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A person who surfs or even skates. They spend most of their time at the beach.
Lucy - That Josh is always at the beach.
George - Oh yeah well he's a grom aye?
by ledde July 1, 2015
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A badass little bike that cant do anything a big bike can. Except better!! Is just as fun and cost less. Gets pussy and will teach you that the streets are real.
Random stranger in public : Thats a badass little bike what is that?

Grom stunter : Its a grom.... Braaaapppp!
by Chicopmr October 7, 2017
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Pussies who hang out at 800 and act tough. They only jump kids 10-1 because in any fair fight they would get their ass beat. They pull up to parties univited even though no one wants them there. Complete fags.
Should we go to that party? No because the groms are prolly gonna crash it and they are all fags.
by Sebi Basti Feunede May 6, 2019
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