A stopper that seals a hole or opening (like in a barrel); also British slang meaning to throw something carelessly.
From Dutch 'bonghe' or similar, possibly of Scandinavian origin, originally referring to barrel plugs; the slang meaning (throw) developed in 20th century British English.
Bung started as a boring cork in a barrel but evolved into British slang for tossing something—'bung it in the bin'—which shows how working-class language takes practical tools and turns them into verbs!
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