so-and-so ; so-so

السلام عليكم ورحمة الله وبركاته

A): so-and-so

This informal expression is used when one cannot remember a name *
e.g. What's happened to old so-and-so? (=what's his name?)0

It can also replace a swearword or an insult *
e.g. she's an old so-and-so


B): so-so

This informal expression means 'neither good nor bad' 0*
e.g. How are you feeling? the answer is So-so
e.g. Was the concert any good? the answer is So-so


From : Practical English Usage Book

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