Rainmaker: 1) A person who attempts to cause rain to fall, either by rituals or by a scientific technique such as seeding clouds with crystals.
2) A person who generates income for a business or organisation by brokering deals or attracting clients or funds.

Slaughter and May corporate veteran Nigel Boardman (pictured below) does not like the question. The partner – arguably one of the best-known legal dealmakers in London – has been asked for his thoughts on rainmakers.