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general::
Phrase(s): (Have you) been keeping busy? [and] (Have you been) keeping busy?; You been keeping busy?
Inf. a vague greeting asking about how someone has been occupied. • Tom: Been keeping busy? Bill: Yeah. Too busy. • Sue: Hi, Fred. Have you been keeping busy? Fred: Not really. Just doing what I have to.
McGrawhill's American Idioms And Phrasal Verbs