Milsim 

Short for Military Simulation. It is usually a type of airsoft game often consisting of several hundred players, usually wearing a standardized loadout for whichever side in the game they are playing on so they will be recognizable to their teammates and add to the realism of the event. They can sometimes last several days, and are often very expensive to get ready for depending on what kind of gear you need for the event and what kind of gear you already have. Milsim games are typically more organized than a standard pickup game at a local airsoft field, being that squads often communicate with radios, and different squads have different objectives. Milsim games can vary in realism quite substantially, some even going all the way through the night, using pyrotechnics to increase the effect, and sometimes even using real guns firing blank rounds.

Man, I wish I had enough gear and money to go that Milsim West milsim game!

Milsim by The Very Merry Crusader January 11, 2015

Milsim 

A word that is short for "Military Simulation"

A game in which adults and teenagers follow military style objectives in order to win against an opposing force of other adults and teenagers.

A Military Simulation game that can take an average of 1-3 days to complete.

TTF Milsim is a very good military simulation group!

Milsim by AirsoftNation.org January 5, 2015

MilSim 

A bunch of Shitheads on a game trying to be cool and Simulate the Military

Look at those MilSim Faggots

MilSim by 1stFR Col Chase August 24, 2019

Milsim 

Military Simulation, also used to describe the type of style an airsofter play, CQC or Milsim, usually used as a term by airsofters and some paintballers to show off how fancy their gear looks and the money they are willing to pay to play rediculous airsoft games

Peter S is Milsim

"What type of airsoft do you run?" "I play Outdoor Milsim."

Milsim by Sssttteeevvveeee August 19, 2011

Milsim 

A type of player commonly found on the virtual kids game roblox, they primarily wear military uniforms either fictional or real world (but many tend to wear real world uniforms.) These uniforms are either formal or non formal.
They are sometimes found on games that involve firearms, like phantom forces, bad business, etc. They could also be found on other games of many different genres.

A recent game that contains milsims is the Church, a game filled with homophobes, racists, rednecks, white suprematists, etc.

Over there my friend, is a milsim in its virtual habitat.

Milsim by the roblox “historian” January 4, 2021

Milsim Fiend 

Taking the "R" from "Milsim Friend" for that one guy who takes military sims or tactical shooters way too seriously. Someone who's... A little too into it. Sometimes they would also bring up military stuff into topics that are nothing to do with the military.

Everyone: *talks about topic"

Milsim Fiend: "Did you guys know the M249's rate of fire was actually reduced in the late 2000s to improve barrel life in sustained firefights?"

Person A: "…milsim fiend just deployed mid-waifu debate."
Person B: "We're talking about topic and he's talking about suppressive fire."

Milsim Fiend by CrossFLangley April 15, 2025

ROBLOX MilSim 

ROBLOX MilSim is generally a niche of people who LARP as "soldiers". Unfortunately, a very large majority of these people are just as toxic and pedophilic as rogangsters. They tend to wear either fictional or real-world uniforms from various militaries, though most will be wearing copy-paste OCPs, M81s, or Russian camouflage and overrated Community Creation gear. Take everything they say with a grain of salt, MilSimmers are very easy people to enrage in pointless arguments with. They love to suck people off for free ranking in groups as well. They typically tend to talk about what kind of round they think is best to kill themselves with, or why an M60 Patton tank is far better at running over refugees than a Challenger II. The typical armchair soldier spends many hours in ROBLOX/Discord military group games and dedicate their souls to their group. Many MilSimmers also bear the dreaded Premium badge. Many of them tend to be either far-left braindead retards or far-right chuds, those in between are a very small few. They talk real game but aren't actually any threat when you ignore them. Overall, they are just a well-organized rogangster militia but more LARPing and grooming than usual.

"Hey, which 7.62mm round should I shoot my cat with? The Tungsten carbide ones are good at armor penetration and better than the shitty standards!" - Standard ROBLOX MilSimmer
"I don't know John, maybe you should use the 120mm APFSDS, it's far better at penetration."

ROBLOX MilSim by ROBLOX Historian January 22, 2021