[darken one’s door] or [darken the door] To appear, as in a doorway; enter someone’s home or establishment. – Used in negative imperative sentences especially with “never” and “again”.
If you leave this house now, never darken my door again.
After a son shamed his father by having to go to prison, the father told him never to darken his door again.
Топик моя биография.
Значение идиомы darken one’s door