V. S. O.
- (of brandy) very superior old.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- very superior old: used to indicate that a brandy, port, etc, is between 12 and 17 years old
- (in Britain) Voluntary Service Overseas: an organization that sends young volunteers to use and teach their skills in developing countries