An intense heat wave, i.e. a period of unbearably hot and sunny weather. A portmanteau formed by the words "sun" and "tsunami."
The sudden sunami that struck was hot enough to cook eggs outside without any means of man-made heat and to make Al Gore want to jump in front of a bus.
by Terminus_Est September 17, 2008
A cataclysmic event of epic proportions where the earth and waters move in tandem causing death and destruction. Derived from Tsunami, but not exactly a tsunami, but rather a general, almost poetic word for gigantic, natural catastrophes involving land and seas.
When Lord Shiva opened his divine third eye, he unleashed a thousand sunamis that wrought havoc on all life all over planet terra.
by Sunami September 01, 2006