a character in the book David Copperfield (1850) by Charles Dickens, who is a clerk (=someone who keeps records in an office) working for a lawyer. He pretends to be very helpful, and he is known for often saying how "'umble" (=humble) he is. But in fact he is clever and dishonest, and only interested in getting advantages for himself.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
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