Grumin 

To speak gibberish or garbled words. To mumble while saying things no one can understand. To speak drunkenly while sober.
Grumin can sometimes be funny and used mocklingly, but at other times it is annoying and overplayed.

Guy1:"Gots de da gram fence knot!"
Guy2:"Dude stop the grumin its gettin annoying."

Grumin by Graham-Chan July 20, 2008

Grumio 

Someone who gets all the ancillas and be dining like a boss

Caecilius: Hey what happened to my slave girl and my food!
Clemens: that up to no-good grumio probaly took them.
Caecilius: Eheu!

Grumio by BJHSILOVEONEDIRECTION November 20, 2013

Ad Graminum

An attack on an opponent's grammar to completely discredit his/her argument.

See Ad hominem.

Faiz: I spent a good half-hour typing out an argument for nothing, because someone used Ad Graminum and pointed out my "your" that should have been "you're".

Julian: You deserved that.

Brian: The Lakers are fundamentally a much better team, they're offense is-
Julian: HA! "THEIR"!
Brian: Fuck you.

Ad Graminum by jschoo March 12, 2012

Groming 

The art of casually browsing through your phone in a group of people rather than take part in the conversation. To ignore those you are with to Grom your phone.

"Wow, I can see Tom is just Groming away again instead of talking to his friends"

Groming by Brandon Brit December 12, 2019

Grubinate 

To take an argument and research every possible aspect of it on Wikipedia, memorize the most relevant facts, mull over your side of the argument until its finely honed like the edge of a samurai sword, then attack the people who are opposing your viewpoint and then metaphorically slice them into tiny bits while refusing to accept alternate viewpoints.

Pardon me while I grubinate over the issue of why God does not exist.

Grubinate by mildmildwest December 9, 2008

grubinator 

A person involved in activities who is constantly getting into predicaments and wondering why bad stuff always happens to them.

Steve the lawnmower guy is a grubinator.

Drinking then climbing onto your lawnmower and driving to the Oyster Shack is a stupid move grubinator. Shoulda stayed on the porch Steve.

grubinator by TG33 April 25, 2010

Grumio 

An absolute god among men. This sexy beast is the cook in latin textbooks. He gets mad hoes except for that no good skank hoe Poppea. This immortal creature, this unstoppable beast of what can barely be described as a man, who's power knows no limits, is an unforgettable addition to your latin textbook

Dude 1: "Dude you see that sexy beast being followed around by all those swooning people
Dude 2: "Yeah thats Grumio

Grumio by tastysuccman June 11, 2019