din into

din (something) into (one)

To ingrain something in one's mind through constant repetition. When your mother and I were kids, we learned the multiplication tables because our teacher dinned them into us. The manager always dins the same motivational catch phrases into us whenever we have a staff meeting.
See also: din
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

din something into someone

 and din something in
to repeat something over and over to someone. (As if one could "hammer" words into someone.) The teacher dinned it into her constantly, but it did no good. He dinned in the same message over and over.
See also: din
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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