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Phrase(s): the facts of life
1. Euph. the facts of sex and reproduction, especially human reproduction. (See also the birds and the bees.) • My parents told me the facts of life when I was nine years old. • Bill learned the facts of life from his classmates. 2. Fig. the truth about the unpleasant ways that the world works. • Mary really learned the facts of life when she got her first job. • Tom couldn’t accept the facts of life in business, so he quit.
McGrawhill's American Idioms And Phrasal Verbs