old boy
old chap
One of the men educated at the same institution and bound by strong ties of loyalty to each other.
He got the job because the boss was another old boy.
old college try
An attempt to win a favor from another by mentioning the fact that one had gone to the same college or university as the party from whom the favor is requested.
Since he needed a job, he decided to use the old college try when he contacted Jerry, but it didn't work.
old country
Primarily Europe, but also any country other than the United States where one originally came from.
Al's wife was born in Chicago but Al himself is from the old country, Ireland.
old flame
An erstwhile lover.
Did you know that Meg was one of Howard's old flames?
old friends and old wine are best
Старый друг лучше новых двух
Old wood best to burn, old wine to drink, old friends to trust, and old authors to read.
Лучше всего горит старый лес , пьется - старое вино, заслуживают доверия – старые друзья, читаются – старые писатели.
old guard
People whose ideas may be out of date, but who have been in power for a long time.
There will not be any change in policy at the company, as long as the old guard still works here.
old hand
An experienced and highly skilled expert at some particular job.
Uncle Joe is an old hand at repairing car engines.
old hat
Old-fashioned; not new or different.
By now, putting satellites in orbit is old hat to space scientists.
Andrea thought her mother's ideas about dating were old hat.