insubstantial words, arguments, gestures, or actions used in an attempt to explain or persuade.
Why Are We Calling Everything A “Wave”?Why have so many waves found their way into our cultural lexicon in recent years? In this article, the first in the column Mincing Metaphors, we unpack this oceanic metaphor to better understand what it means and why it’s proving so useful right now.
Also hand-wav·ing, hand·wav·ing [hand-wey-ving] /ˈhændˌweɪ vɪŋ/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hand-waving
The houses beneath him seemed companionable; friendly were the hand-waving crowds, and factory-whistles gave him raucous greeting.The Trail of the Hawk|Sinclair Lewis