english
1
general::
see under GET IT, def. 2.
American Heritage Idioms
2
general::
Phrase(s): You just don’t get it! Inf. You really don’t see what people are trying to tell you! (Also with subjects other than second person.) • You just don’t get it! People avoid you because you offend them.
McGrawhill's American Idioms And Phrasal Verbs