From Longman Dictionary of Contemporary Englishrub something/somebody ↔ out phrasal verb1 British EnglishREMOVE to remove writing, a picture etc from a surface by rubbing it with a piece of rubber, a cloth etc SYN erase Draw the outline lightly with a soft pencil. This can be rubbed out later.2 American English old-fashioned informalSCCKILL to murder someone → rub→ See Verb table
Examples from the Corpus
rub out• I admit it: I made the mark, but then I rubbed it out. 