old boy
- Chiefly Brit., Informal an alumnus, esp. of a boys' preparatory school
- a man belonging to a social, professional, etc. group regarded as prestigious or influential, whose members provide one another with assistance or preferential treatment
See old boy in American Heritage Dictionary 4
noun- Chiefly British A graduate of a public school for boys.
- A man who is a member of an old-boy network.
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