silly mistake; careless error
A wasei-eigo term for a mistake that could have been easily avoided with more attention. Often used in sports, work, or daily life. Similar to 凡ミス.
wasei-eigo (Japanese-coined English), from easy miss
See also: 凡ミス
I made a careless mistake at the end of the match and lost.
This is the first time I've made such a silly mistake.