“You betcha-wetcha, Fluttershy!” Pinkie yelled into her megaphone. It was so loud that it caused Fluttershy’s pink hair to blow backward in a gust of wind. Fluttershy winced. “Whoopsies!” Pinkie giggled, moving the megaphone away from her face. “Sorry, got a little carried away!”
Source: wiktionary
A wet, sloppy, hairy thing hit me smack in the face. She flipped on the light and shut the door behind us. “Oh, whoopsies! Sorry, let me get that for you.” She pulled a mop off of my face.
Source: wiktionary
This time, as he lowered his head, it suddenly ran into something soft. […] The woman he bumped into, though, went “Whoopsies,” and didn’t seem to mind it very much.
Source: wiktionary
Staff leave boxes of pills on your bed, / The stupid people never check the bags, / They leave you alone instead! / You fight, / You battle, / A war inside your head. / The staff return, / “Oh whoopsies I left these on your bed!”
Source: wiktionary