doo ‧ zy /ˈduːzi/ BrE AmE noun ( plural doozies ) [countable] American English informal
[ Date: 1900-2000 ; Origin: Perhaps from daisy , influenced by the name of the Italian actress Eleonora Duse (1859-1924) ]
something that is extremely good, bad, strange, big etc:
I’ve heard lies before, but that one was a real doozy!