Anti-Climax Boss: Some quest bosses fit under this. Especially true during quests since almost all boxes have 10 sec Musou.
Awesome Music: Almost all of the music played during matches are remixes of some of the best music from the series. Opinions vary on whether they're better than the original or not, but it's generally agreed that the music is really good.
Big Lipped Alligator Moment: Done well, actually. The peach garden and Kunlun mountains. The main game is pretty usual for Dynasty Warriors, you fight for control of China against enemy warriors, but peach garden is very odd by comparison. You fight with people from any faction in the game, rival or not, or just hang out. Kunlun mountains started out a little odd, fight alone or along with other people to complete challenges, but they added more things from other warriors games that were more intesersting. Currently, in the Japanese version, you have a chance of fighting either Nu Wa for Fu Xi, both have aspects of being a Physical God, and you can face the guardians of the 4 directions, and the English version is about to one of them added.
Complacent Gaming Syndrome: As of 3/13/2012 on the English server, there are 38 weapons, 5 game modes (you can access at any time), and 12 maps. Roughly 5 or 6 of the available weapons are ever actually used by veteran players, only 3 maps are ever used (if you're lucky), and only one game mode is ever constantly played. Needless to say, it's really bad here. It gets so bad in the English server, that if two factions aren't able to play on Plains, Fortress, or Docks, expect there to be no games whatsoever between them. The Abridged Arena Array is horrible on the English server. Fortress and Docks are lucky. Plains is the most common map to fight on. It's simple, very flat with some bases spread around. This also might stem from the game mechanics, where you can viably run away and have a good chance of making it away from the battle, so areas like Plains make it easier to follow anybody fleeing.
Ensemble Darkhorse: Ling Ling, an automatic COM should nobody take up the 4th player on the starter's team, is surprisingly popular on the English server.
One of the most common you will see is for people who use tactics not in the game to play. "Alt Tabber" is used to explain somebody who uses the command "alt+tab" to exit out of the game during a losing match. "Com Famer" is a name given given to somebody who farms the COM of a player who disconnected, because those still give you points for defeating them, but if the enemy was AI-controlled from the start it doesn't count.
Super Saiyan: Somebody who lags on the server so much that they start teleporting around during battle, with an obvious comparison to battles during Dragon Ball Z.
Limbo: The name given to the central plaza after the scenario officially ends. See NightmareFuel below to see why.
Gameplay Derailment: A player-invoked one. The Japanese server has players that focus on getting a weapon that is balanced and using skill and teamwork to overcome the enemy, though a few still try to win as cheaply as possible. In the English server, most games that are made by players are PVP (here referring to the direct player vs. player mode Confront), and everybody should be using a weapon that can kill quickly. It's by no means bad: as more weapons are released new ways of playing PVP are found and break the older stagnated style, and PVP is a genuinely fun way to play the game and offers a unique challenge to both veterans of the game and those who have never played it, but people still seem intent on PVP as much as possible, only changing style for battles of control. Other indirect PVP modes, where the focus isn't on facing other players in combat but still facing them in a challenge, are ignored.
Good Bad Bugs: There are a few interesting bugs around, one common one is getting on top of buildings and other structures, normally impossible.
Goddamned Bats: Mage mooks. They go down easily, but given how often you ignore mooks this guy can be easy to miss. The main reason he is hated is because he attacks with an ice elemental ranged attack, and that means he has a chance at freezing you at exactly the wrong time. The main problem is that he is so easy to overlook when you're fighting an enemy commander - a situation where he can cause the most damage - that you may end up getting blindsided by him.
Nightmare Fuel: After a scenario ends, you can only go to two places until the next scenario is ready. Your house, and the central plaza of your faction. There are few NPC's, and probably no players here unless the scenario ended recently, and the place looks like it's slowly becoming a ghost town. The fact that the cheerful music that usually plays is missing only adds to it. Players call it Limbo for a good reason.
“Stop Having Fun” Guys: If you aren't a high rank when you enter a musou match, the "all ranks all weapons" mode, expect to get booted or for nobody to stay. Also, if your weapon isn't tempered a certain way (or you're not using a weapon "approved" for the game mode), your teammates will probably, at best, question your choice of weapon.
The Scrappy: In contrast to Ensemble Darkhorse Ling Ling, Wei Xhixi, the 3rd COM for a player on the side that didn't start the game, is similarly hated by all as an annoying brat.
Woolseyism: Certain translations can be clear with a bit of digging, but most weapon names are this. Some of the weapon names are done well, Chackram(ranged) are actually water and wind wheels (melee weapons) but as the name feels natural, but some are off, a bo staff is called a "cudgel", and a few are a bit insulting, "Cursed Deck" is the name given to magical paper charms which don't look at all like cards. For the most part the translations are very suitable for the weapons.
To be fair, most (if not all of the weapon names) are the same as their DW 5 counterpart (Like "Deck" for example). This makes sense (cause they're the same game), but it should be noted that the translation for the online version is handled by Aeria games, not Koei.