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English definition of “slug”

slug

noun [C] uk   /slʌɡ/ us  

slug noun [C] (CREATURE)

a small, usually black or brown creature with a long, soft body and no arms or legs, like a snail but with no shell mainly US informal a slow-moving, lazy person
See also

slug noun [C] (BULLET)

informal a bullet: The poor guy wound up with a slug in his stomach.

slug noun [C] (AMOUNT OF DRINK)

informal an amount of drink, especially strong alcoholic drink, that you can swallow at one time: I had a slug of vodka to give me courage.

slug noun [C] (COIN)

US a piece of metal used instead of a coin for putting in machines

slug

verb [T] uk   /slʌɡ/ (-gg-) us  
informal to hit someone hard with the fist (= closed hand): She slugged him and he fell against the bar. US to hit a baseball hard
(Definition of slug from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of slug?
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