I'm cross posting this here, since the "Editors"/"Editing" Forum has essentially been dead for some time.
In the following sentence:
That too received a chorus of encouraging "Boo!"s.
should it be "Boos!" or "Boo!"s?
Both seem sorta correct, while also seeming sorta wrong too. Again, this is casual, teasing usage, so the standard rule's probably don't apply. The Boos are obviously plural, yet if each one is repeating the boos, is it a case of plural plurals?