can be summed up simply as such: any person and or persons who are simply doing something to not conform but to rebel against conformity, but as by doing such conform to non-conformity by going out and purchasing emo clothes and doing their hair in an emo way.
another way of putting it is a toned down punk person, not rebeling against government and the system, but again pop clulture and stoicism.

i'm an all rounder, love sci fi, listen to rock, write songs and poems, lord of the rings, and still i'm classed as a nerd/geek? i read comics, enjoy company, never cry, have a messenger bag, love life, writing a novel, am i an emo kid?

Have i driven them both away?
from my lonely side
misunderstanding all the signals
how could i've been so blind

she hasn't wrote
and still knowing
i remain in wait
what was it that i done
that drove them both away

what do you think?

Kid = child, teenager, young adult. Or a young goat.
Emo = emotive hardcore.
Emotive hardcore = genre of music.
Emo Kid = listens to emotive hardcore, makes themselves stand out by dressing a certain way, acting a certain way etc.

Just another high school stereotype, like prep, gangster, goth, jock, etc.

Root: Emo - Short for Emotional (Emotional Rock, Emotional Punk, Emotion Core)
Kid - not quite a child, not yet an adult

A member of a once-sub-culture born after the death of punk and the rise of power-pop - which has become the latest pop culture. Its identity and entity exist in the ideas that no one understands the emo kid quite like "this" music singer does. Buys effeminate clothing at Hot Topic, sometimes salvation army lends a hand, or takes hand-me-downs.

Proof of these "emo kids" being the current pop culture exist in the numbers. Hot Topic sells more merchandise per square foot than Walmart (The retail store for 90% of the other American cultures combined).

Despite numbers and despite proof, these subjects consider themselves unique, misunderstood, and unidentifiable.

Emo kids rely on their parents to feed, clothe, and shelter them in most cases, yet resent any advice or love broadcast from them (which, sadly, such love is usually the cure for this ailment). Although currently large in numbers and have a stable habitat on myspace.com, the emo kids will become a quickly dying breed, simply because brooding, listening to music, depression, and angst do not make for self-sustainence nor proper job skills.

ew emo kids are annoying most of them anyway
LIFE isnt all about relating to sad music.
geez eat some oreos and get fat and happy.

Stupid wannabe hardcore bitch who's favourite pastime is crying in a corner because their hair its straight enough! They are townies at heart, but listen to this whining shit becuase "Metal" has suddenly become cool!

The Kids That Camp Outside of A Classroom Door, Like They Have No Lives, And Rush In As Soon As The Teacher Enters To Give Sato Sensei Their Damn Permission Slips So No One Else Can Go On The Freaking Field Trip!