good old time—(also: good old times) the past, viewed as preferable to the present:
- However glorious those “good old times” may have been, they still were destitute of one very important advantage.
high old time—(coll.) an enjoyable, festive period or occasion (usually in the phrase “have a high old time”):
- It might look like they’re having a high old time. But really, it’s very hard work.