He took in the meaningless syllables and her unnatural expression at one moment.

Webster's New World gives this: meaningless syllables that seem to make sense; gibberish.

The words, long meaningless syllables, nevertheless chilled them.

The guaguancó song often begins with the soloist singing meaningless syllables, which is called the diana.

Even Kennard's voice was only a blur of meaningless syllables, verbal hash, word salad.

She spoke to him in a stream of meaningless syllables, but the hand that she held out, palm up, was eloquent enough.

I am seeking an outcome in which Harwood Levine will not have become four meaningless syllables.

Lyrics can be about any number of subjects, and often include vocables (meaningless syllables).

He had to chance it four meaningless syllables to the Prince, but Jeff would understand.

Mr. Greenberg stood up again and boomed the meaningless syllables out over the lawn, his face red with effort.