Excess flux from a weld, usu. projecting in such a manner as to impede fit. Removed by grinding, filing, or the use of a slag hammer.
That guy shouldn't have access to an arc welder! He has an inch of slag for every damned joint!
ayon kay Ike ika-26 ng Enero, 2005
Slag (noun)
A slug, sloth, humanoid hybrid proned to adverse laziness with a lack of attention to hygene. Typically can be found slouching or laying on your couch staining the cushions with its greasy hair
Dude...get your slag ass off my couch..you haven't showered in days!
ayon kay stiky ika-19 ng Nobyembre, 2013
A female who is a bit too available, sexually. She often presents herself in too little clothing and, in some extreme cases of slaggery, she has been known to perform oral sex on boyfriends that are not her own.
Do you really think that woman is a slag?

Yes, i saw her with a few different men in the span of a bakers dozens worth of days.

Oh, so what does that make you?

A slagaholic..
ayon kay shootintildeath ika-23 ng Enero, 2013
A disparaging title used to reference a less than reputable woman with loose morals and questionable personal hygiene.
You dirty slag!
ayon kay TaDouleur ika-09 ng Enero, 2012
a girl who sens pictures around on facebook of her in underwear to get attention. a girl much like sharon o'brian
shes a right slag

shes doing a sharon o'brian
ayon kay dildofarrell ika-14 ng Nobyembre, 2011
Slag: A slag is a male or female, who have sexuall intercourse with three members of the opposite sex for one McDonald's chip, this most commonly happens in a back yard shed but the term can be given to any person who has done the above traits.
Choppen, nuff said. slag.
ayon kay awesomemand ika-13 ng Hunyo, 2011
A woman, who sells her smiles for money.
A - "Hi, will you give me some money? :)"

A - "Please!"

A - "Pretty please!"

B - "What will I get for it? A smile?"

A - "Yeah!"

B - "Slag!"
ayon kay A-Man-In-Lion's-Costume ika-11 ng Abril, 2011

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