1
general::
Phrase(s): report in sick
to call one’s office to say that one will not come to work because one is sick; to show up for work ill. (See also call in sick. Normally, one must be present to report in.) • I don’t feel well today. I will report in sick. • The phone was busy, so I reported in sick by e-mail.
McGrawhill's American Idioms And Phrasal Verbs