A businessman whose business is merchant banking(noun)
(slang) a wanker (usually abbreviated as merchant)(noun)
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Use "merchant banker" in a sentence
"On one side of her was the exceedingly prosperous merchant banker and company director Titus Pomponius, and. on the other side lived Gaius Julius Caesar, a senator."
"Every balcony, loggia, peristyle-garden, and window in the city burgeoned with mouldy washing, contributing to the general fug, and houses where small babies dwelled — like the one of the merchant banker Titus Pomponius — suddenly found their peristyle-gardens filled with line upon line of drying diapers."
""Did you hear?" asked that Caecilia who was the wife of the merchant banker Titus Pomponius."