There's bound to be a time when this is needed

Prudence is indebted to lovely friend S for this most useful of phrases:

Te Audire no possum. Musa sapientum fix est in aure.

Which translates as: I can't hear you. I have a banana in my ear.

Not having had a classical education, Prudence does not know how to pronounce this, but suspects anyone to whom she directs it, doesn't either.