Refers to a person, weapon, or vehicle which has a high output, but a low defense, life, durability, etc.
The Blaster (City of Heroes), dex zon (Diablo 2),golf glub (Silent Hill 4),and Red Gazelle (F-Zero GX) are glass cannons.
by whatsaname October 07, 2004
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In the context of an (MMO)RPG:

1. Usually refers to the casting classes, i.e. the ones that rely on magic instead of melee.

2. Generally the term applies to any character class that delivers more attack damage than, yet will nevertheless lose in a 1 vs 1 fight to, some standard garden-variety warrior.

Kiting is a glass cannon's best friend.
Warrior1: Dude, I just killed like 10 wizards, woot.

Warrior2: SFW dude, they're glass cannons, and they had already used up all their spells.
by majorcatass August 15, 2007
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A girl with great looks but little to no substance; a weak constitution. These girls are generally shallow and usually fall for the "bad boys," which are the boys that treat her like crap so she has to constantly qualify and validate herself.
Dude, don't go for Tomi. She's a glass cannon.
by pydrasparadox August 05, 2020
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Game Term. Refers to a class of vehicle or sometimes a unit that has very high attack strength and sometimes long range but generally poor defense and low health as a result.

The general strategy for them is to either destroy the enemy before being attacked or hides behind other, stronger ally units.
The artillery unit in that game is great. But it's a Glass Cannon, I only use it for defense.
by CommandoDude May 06, 2010
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Refers to someone or something that deals high amounts of damage but had a very weak defense or health. Often a term for games.

The best way to fully embrace being a glass cannon is to be very careful when you attack. Wait for an opening in which you are guaranteed a safe or almost safe hit to be as useful as possible.
John is a glass cannon, he got into a fight and with one hit gave someone a bloody nose, but he started crying the second he was hit once.
by TheFizzWhiz February 20, 2021
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A build of an Amazon in Diablo II, which has low life and defense but makes up in the fields of insane damage and speed with a bow.
You basically stack Dex instead of Vit, and instant damage.
Your goal is usually a 7 frame attack.
Fred: Woah, did you see Bill's new Glass Cannon? That mother fucker owned all the little hoes in that pub game!
John: He stole my gold :(
Fred: Shut up John, you little bitch.
by DaysOfDeath August 30, 2008
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A person who acts and thinks highly of themself because they know how to significantly offend other people or do great damage towards other people when they get angry or want revenge, but when someone does the slightest thing to them, they cry and whine like a little bitch.

Another synonym is a glass gun. Comes from video gaming and role-playing games, when you have a character and/or weapons that have high offensive power, but weak defensive power.
Person 1: You know Katie and Chad are glass cannons, right?
Person 2: What do you mean?
Person 1: Because they hold a lot of clout and they love starting unnecessary conflict with people to slander other people and they can fight really well, like seriously they can beat your ass. But as soon as someone does one bad small thing to them, they fracture and shatter like a glass chalice.
Person 2: Oh yeah they're both weak bitches for real.
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