Rub out
WordNet
verb
(1) Remove by or as if by rubbing or erasing
"Please erase the formula on the blackboard--it is wrong!"
WiktionaryText
Verb
- To delete or erase or remove (something) by rubbing.
- The teacher wanted to rub out the chalk marks on the board.
- To kill.
- We had to rub out that witness.
Usage notes
- In both senses the object may appear before or after the particle. If the object is a pronoun, then it must be before the particle.