“Doozy” is an English word used, mainly, in the United States and Canada to indicate something big, something extraordinary.
Facing climate and ecological breakdown, pandemics, oppressions, racism, sexism, classism, disablism, ageism, adultism, anti-Semitism, addictions, grief, trauma, and disconnection – these are all doozies.
“Que” means “How” in Spanish, as in, “Qué divertido!” (“How fun!”). So “Qué Doozy!” would mean “How Big/Extraordinary!” But we are spelling it: Keduzi to be different. And to make it easier to pronounce.