a blot on something 何かの上についた汚点、傷、染み。
3:35 the blot on the Rising Sun. 日出づる国の不名誉
The Four Cracks in the Japanese Model - VisualPolitik EN
2:39 this is a blot on your copybook. これは君の成績に響くよ。blot your copybook もイディオム。
Cruella First 9 Minutes - Exclusive (2021) | FandangoNOW Extras
43:25 there's no blot on your record. 君の成績に汚点はないよ。
The Prisoner: Season 1 Episode 1 - Arrival (Full Episode)
