Do a roaring trade (in something) British informal
To sell a lot of goods in a short period of time
Alison's done a roaring trade in second-hand clothes and helped her family to overcome the poverty.
Yesterday was a heavy rainy day, so Lee did a roaring trade in umbrellas.
The verb "do" should be conjugated according to its tense.
Very dishonest and deceptive
Don't play cards with Tom. He's as crooked as a dog's hind leg.
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