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general::
Phrase(s): blank something out
1. Lit. to erase something, as on a computer screen. • Who blanked out the information that was on my screen? • Please blank your password out as soon as you type it. 2. Fig. to forget something, perhaps on purpose; to blot something out of memory. • I’m sorry, I just blanked your question out. • I blanked out your question. What did you say?
McGrawhill's American Idioms And Phrasal Verbs