oopsy

/ˈuːpsi/noun

noun

गल्ती; प्रायः जब शिशु र साना बालबालिकाले आफ्नो लुगा फोहोर गर्छन्

A mistake; often when babies and young children soil their pants.

I have made an oopsy.
मैले एउटा गल्ती गरेँ।

A note on usage

childish