1
general::
Phrase(s): know when one is not wanted
to sense when one’s presence is not welcome; to know when one is not among friends. (Usually said when someone feels hurt by being ignored by people.) • I’m leaving this place! I know when I’m not wanted! • She doesn’t know when she’s not wanted. Can’t she tell she’s out of place?
McGrawhill's American Idioms And Phrasal Verbs