bury one's head in the sand

A reference to the imagined habit of the ostrich burying its head when threatened. See also head in the sand.

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bury one's head in the sand (third-person singular simple present buries one's head in the sand, present participle burying one's head in the sand, simple past and past participle buried one's head in the sand)

1. (idiomatic) To deliberately ignore the reality of a situation; to pretend a problem does not exist.