15
An all-purpose, non-vulgar word, originating from the Transformers cartoons, to be used in place of just about any profanity.
"Oh slag! The Decepticons are attacking!"
"This is a piece of slag."
by Terenn September 08, 2005
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16
1. A man or woman who sleeps around with many people.
2. low quality Coal that is unusable.
1. Katie slepped with John on saturday and then Peter on Sunday. What a Slag.

2. Look at the Slag Heap's next to the coal Mines
by Tony June 12, 2004
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17
Cheap low-life female, usually predatory,trashily dressed who'll offer herself for sex at every opportunity, an expert at 'Man-snatching': men who already have a respectable female partner.
A destroyer of relationships, slutty, bad-mouthed, overly made up harridans who love any form of sexual contact, often at the expense of established relationships.
Rachel is a right slag!, three times this week she's hung around the pool room and has succeeded in shagging four married men!
by Inja November 03, 2007
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18
a woman that fucks behind her partners back
you are nothin but a fuckin slag kelly .i hope you catch syphilis because it will probably make your stinking gash smell better
by Anonymous April 06, 2003
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19
it is a word that boys or men give to women when they have no better insult for them when women
a. refuse to sleep with them or
b. act like men
c. admit to enjoying sex
women: "sorry love your not my type"

man: "whatever then your a slag"
by Laura and Relly March 16, 2006
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20
A woman who is infinately cock-hungry and shags many men behind her partner, usually with a wide pussy
Slag's friend: Theres 60 men with boners from here to the door. Can you make it?
Slag: No! (starts sucking the nearest man's cock and telling the others to stuf their dicks in)
by pieman349 February 22, 2010
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21
Apart from other more obvious meanings, Slag is a waist product produced inside a Blast Furnace. It is produced when Limestone is used to remove impurities in Iron. This can be difficult to dispose of and may form slag heaps when dumped in the environment. These are large mounds of thrown away slag.
Citizen: I hate all this waist slag polluting the local environment.

Council member: Don't worry; we are currently working on removing all of the slag heaps.
by Chemistry12345 June 25, 2011
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