/ohld" boy"/ for 1, 2; /ohld" boy'/ for 3; /ohld' boy"/ for 4
1. Informal ( sometimes disparaging ). an adult male, esp. a Southerner. Cf. good old boy .
2. a lively elderly man.
3. Chiefly Brit. an alumnus, esp. of a boys' preparatory or public school.
4. Chiefly Brit. See old chap .
[ 1595-1605 ]