Source: Russia opens major gulag museum as Putin blanks victims' commemorations
Example:
Russia on Friday opened a major new museum on the horrors of the Soviet gulag labour camp system but President Vladimir Putin blanked the day commemorating victims of state terror.
What exactly do you think they mean by the verb blanked in that passage? The most common usage, and drawing on my personal experience with the English language I assume the only one out there that's actually in common use (in North American English at least), is to blank something out which basically means to make something a clean slate again, but that doesn't really fit the semantics of the sentence.