1) - to spit.
2) - a woman whom sleeps around, looks cheap &/or has questionable character.
3) - the waste product of the steel making process.

A girl or boy who shags everything in sight. has 1 million STDs

1. An individual who cares not for relationships beyond the realm of the sexual, these people sleep with many partners not caring about anything save for the moment of climax.

2. Rubbish that is not worth the time or effort of paying attention to it, but none the less draws one in. Used to describe unpleasent situations.

3. Physical trash, often scrap metals.

4. Drawn from frag, to slag something is to destroy it, used in cases of technological rather then biological items.

Some who sleeps round a lot, no Caring for anyone

1) U.K. criticism: a series of insulting, mocking, or critical comments.

2) USA: To sleep with someone.

A slag is the top crust of the bread because everyone touches it but no one likes it just like a slag as in a man or woman slag.

Usually used in reference to a lady who has a revolving door to her bedroom. Though less common, 'slag' may also be applied to males who spread their seed too thinly and on bad soil.

a woman who has her legs so wide apart she makes the channel tunnel look insignficant

The addition of superfluous material (SLAG) to a “news story”, the addition of which is designed to prejudice the recipient’s response to “news”, thus guaranteeing that the recipient will “comprehend” and “understand” the story correctly—in the manipulative lights of those responsible for said slagging. NPR and Clearchannel are equally guilty but from opposite ends of the political spectrum since both “clue” the listener about the “correct” response to the story moreso than giving out raw data for the listener to evaluate.

I.E. the application of Bernays-esque “spin doctoring” to influence public perception while pretending to the objectivity of reporting. Political Correctness and Neo-Con Righteousness are equally guilty of the abuse. So named from “SLAG”, the impurities burned and refined out of raw material in metal working.