Metalcore is a genre that has been around since the eighties but not totally popularized until the mid 90's with bands such as Unearth, the modern forerunners in the genre. It includes a mixture of hardcore punk and heavy metal and uses generally two guitarists, a bassist and double kick drums for the instrumentals. Many bands use more than one singer, one generally for more melodic lines and the other, lead singer, who carries many of the vocal burden and usually "screams".

a poor excuse for all metal

Shitty genre of music. It is said to be derived from hardcore punk and heavy metal, but really sounds like Panic! at the Disco with heavier guitar riffs. The vocalists are usually washed up emos.

A subgerne of metal and hardcore that is NOT shit, but is often called shit because a lot of bands don't work to their full potential, and because there are too many bands that are called metalcore and are actually NOT! Real metalcore is usually 70-90% metal and 10-30% hardcore. Fake metalcore is really post hardcore in is often called so because of the existence of a breakdown and screamed vocals! Real metalcore also has guitar solos now and then and often use a low toned type of screaming. Fake metalcore absolutely has no solos and consistently use both screams and death growls, as well as a lot of singing! So next time you here of a metalcore band, compare them to bands like As I Lay Dying, August Burns Red, All That Remains, Killswitch Engaged, etc... If they sound like them, it's real metalcore, if they don't, it's not!

Real Metalcore bands: Underoath (Only there first 2 albums) All That Remains, Avenged Sevenfold (Only there first 2 albums), As I Lay Dying, August Burns Red, Killswitch Engaged.

Fake Metalcore Bands: Underoath (Everything else they made after Cries of The Past), Motionless in White, Attack Attack!, Asking Alexandria

shitty excuse for metal music. Formed from a deformed asshole from which NASA had never seen before. Once opened, the shittackular music spewed through the anal leakage which formed shitty bands like as I lay dying and unearth.

A subgenre of metal and hardcore that is kind of like communism. If it were to be done correctly, it would be perfect, but hardly anyone can do it right and therefore it is mainly horrible. There are some metalcore bands that I actually enjoy (The Dillinger Escape Plan, Hatebreed, Every Time I Die), but most of it (and certainly the most popular bands) incorporate pop punk, electronic, glam, crunk, and all sorts of other shit and make it sound worse than putting a cat in a blender. Not to mention deathcore, which is just an attempt to make an anti-metalcore genre, is even worse and brings shame to death metal. Another thing that humor's me with most metalcore is the bands claim to be the brutalist shit alive but they dress like a 12 year old scene girl.

Metalcore is a music fusion genre that incorporates elements of heavy metal and hardcore punk. The term is a portmanteau of heavy metal and hardcore punk. Although hardcore punk and thrash metal are prominent influences, metalcore bands have been known to incorporate traits of groove metal, alternative metal, death metal, grindcore and post-hardcore. Metalcore subgenres and fusion genres include:Deathcore, and Mathcore

A watered down poor excuse for a metal genre that claims to mix extreme metal and Hardcore punk but really adds Emo, Screamo, Pop and Glam as well. A sorry metal sub genre that falsifies the idea of punk metal into crappy crybaby new generation "brutal" pop metal. Emos and Scene Kids mostly listen to this type of music. Typically, Metalcore = Emo Metal & Deathcore = Scene Metal. Its a band wagon genre like Glam Metal and Rap, people fallow it to the end of its popularity and go back to listening to something usually non-metal related. But not always, sometimes they mature their Heavy Metal music tastes and find better music. Core kids often refer this type of music to Post Hardcore, the name states what it is, "WASN'T" hardcore.
Some of these bands try to label themselves as Grindcore or Thrash but are far from the idea of ever being so.

The genre has motivated a bunch of kids to start these types of bands and fill the underground scene with terrible ill-prepared wanna be in a band type music.

A nice Blend of Hardcore music, with metal. Some what more popular than hardcore, though no matter how hard it tries it will never be popular like shitty nu-metal, which is a good thing.