Green’s Dictionary of Slang

upsydaisy adv.

also oopsy-daisy
[SE upside down]

head-over-heels, upside down.

[US](con. 1917–18) C. MacArthur War Bugs 106: It went upsy-daisy.
[US]C. Cook Robbers (2001) 195: Then for a while her on top, moving her hips back and forth [...] Then oopsy daisy back over, him really coming to her then, hard, breathing heavy.