grom 

Beginner Skateboarder / Surfer

If that grom snakes me again, I'll wrap his board round his head.

grom by hairyBumhole September 24, 2003

grom 

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"

grom by Poopypoopoo696969 February 2, 2017

Grom 

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

Grom by AmityNoceda January 27, 2021

Grom 

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?

Grom by ledde July 13, 2015

Grom 

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!

Grom by Chicopmr October 11, 2017

grom 

Polish special forces which translates to lighting in polish candidates must know 2 different languages and the training of ONE soldier is about 1 Million dollars. The soldier will be also a master in karate and stealth killing.

Grom is a special forces unit

grom by Macej January 9, 2006

grom 

the noise an oncoming giant's footsteps make.

GROM GROM GROM GROM
“mom what’s that?”
“THE GIANTS HONEY! RUN!"

GROM GROM GROM GROM
GROM GROM GROM
IT WAS YOU WASN'T IT?

GROM GROM
“RUN JIMMY, RUN!”
YOU SHALL PAY WITH YOUR LIFE
“DONT STOP UNTIL YOU CAN’T HEAR THE GROM”
GROM GROM

ITS SNACK TIME
“JIMMY NOOOOO”

*crunching grom noises*
“JIMMYYYYYYYYY"
NOW I SHALL GO BACK TO MY SLUMBER AND IF ANYONE DISTURBS ME THEN THE SAME WILL HAPPEN TO THEM

*mother sobbing in empty field*
GROM GROM GROM GROM grom grom grom grom grom

grom by anipug May 31, 2014