Australian slang meaning excellent, fantastic, or first-rate; something very good or impressive.
Australian English slang of uncertain origin, possibly related to 'bosh' or influenced by rhyming slang patterns common in Australian English, emerging in the early-to-mid 20th century.
Australian slang often creates vivid, positive words by transforming or rhyming existing words—'bosker' is an underrated gem that deserves to be more widely used because it sounds both friendly and emphatic.
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