LEARNit Dictionary
rub off
phrasal verb
1
to become part of a person’s character as a result of that person spending time with somebody who has those qualities, etc.
تأثیرگرفتن, اثر پذیرفتن
2
to remove something or to be removed by rubbing
زدودن از طریق ساییدن
She rubbed off the dead skin.
The gold colouring had begun to rub off.
(British English)
If you write on the whiteboard, rub if off at the end of the lesson.