ukkari
A careless, absent-minded lapse in attention resulting in a mistake. Not intentional negligence but a momentary mental slip.
💡Used when someone forgets something, makes a silly mistake, or overlooks something obvious.
うっかり財布を家に忘れてきてしまった。
I absent-mindedly left my wallet at home.
I ___ forgot about our meeting and overslept.
○○会議のことを忘れて寝過ごしてしまった。