Wiktionary
sunnyside up
a. (alternative spelling of sunny side up English)
Wikipedia
Sunnyside Up
Sunnyside-Up was a weekly variety program produced at HSV-7 Melbourne, during the late 1950s and early 1960s.
Usage examples of "sunnyside up".
The eggs were cooked perfectly, sunnyside up, the white firm but not hard.
In the kitchen the breakfast stove gave a hissing sigh and ejected from its warm interior eight pieces of perfectly browned toast, eight eggs sunnyside up, sixteen slices of bacon, two coffees, and two cool glasses of milk.
Since it was early, Jay was having breakfast, and the light version at that: eggs, sunnyside up, two of them.
That is to say, that if you put a egg on top of your football helmet it would be fried sunnyside up in about ten seconds.