[old flame] {n. phr.} An erstwhile lover. * /Did you know […]

[old guard] {n. phr.} People whose ideas may be out of […]

[old hand] {n. phr.} An experienced and highly skilled expert at […]

[old maid] {n. phr.} A spinster; a woman who has never […]

[Old Man of the Sea] {n. phr.} A tiresome burden, especially […]

[old world] {n. phr.} Europe, the continent; a continental manner. * […]

[olive branch] {n. phr.} An overture; a symbol of peace. * […]

[one damn thing after another] or [ODTAA] (pronounced owed-tay) {n. phr.} […]

[one foot in the grave] {n. phr.} Near to death. * […]

[one's money's worth] {n. phr.} A fair return on one's money […]