The phrase "tidal wave" is used to describe a very large wave in the ocean that is caused by the gravitational pull of the moon and sun. It can be powerful and destructive, often crashing onto the shore with a lot of force. Full definition
In this four year period, there were several nasty bear market rallies, lifting the hopes of the hopeful, only to be met with tidal waves of selling. (theirrelevantinvestor.com)
Many entrepreneurs can attest to this; once ideas start flowing, they usually come in tidal waves. (voltaeffect.com)
Big mouth going to look very silly when this huge tidal wave. (nystateofpolitics.com)