slag

1 of 3

noun (1)

Synonyms of slagnext
: the dross or scoria of a metal

slag

2 of 3

noun (2)

chiefly British, disparaging + offensive
: a lewd or promiscuous woman

slag

3 of 3

verb

slagged; slagging

transitive verb

chiefly British
: to criticize harshly

Examples of slag in a Sentence

Verb London reviewers slagged off the new play for being another kitchen-sink drama.
Recent Examples on the Web
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Noun
Other people worked as porteurs (mineral carriers), laveurs (mineral washers), and ramasseurs (groups, consisting mainly of children, who pick up slag that has been discarded near the mines). Literary Hub, 22 Jan. 2026 CT scans employed to study metals For the study, MIT researchers took a slag sample from an ancient site in Iran called Tepe Hissar. Maria Mocerino, Interesting Engineering, 22 Nov. 2025
Verb
Then there was that Vanity Fair profile of Trump’s inner circle of the not really best and the brightest where Chief of Staff Susie Wiles bluntly slagged everyone including her boss or went deep with a Black Op that fell flat. Dominic Patten, Deadline, 20 Dec. 2025 Someone was slagging someone else, someone was telling an outraged story, someone was discussing the logistics of the night. Literary Hub, 22 May 2025 See All Example Sentences for slag

Word History

Etymology

Noun (1)

Middle Low German slagge

Noun (2)

earlier argot slag coward, worthless person

Verb

probably from slag entry 2

First Known Use

Noun (1)

1552, in the meaning defined above

Noun (2)

circa 1958, in the meaning defined above

Verb

1971, in the meaning defined above

Time Traveler
The first known use of slag was in 1552

Browse Nearby Words

Cite this Entry

“Slag.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/slag. Accessed 28 Jan. 2026.

Kids Definition

slag

noun
ˈslag
: waste left after the melting of ores and the separation of the metal from them

More from Merriam-Webster on slag

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