rub out

rub out (third-person singular simple present rubs out, present participle rubbing out, simple past and past participle rubbed out)

1. (transitive) To delete or erase or remove (something) by rubbing.

   The teacher wanted to rub out the chalk marks on the blackboard.

2. (obsolete) To get by; to live.
   • 1603, John Florio, transl.; Michel de Montaigne, chapter 54, in The Essayes, […], book I, printed at London: By Val[entine] Simmes for Edward Blount […], OCLC 946730821:

     The first will understand but little of them, the latter over much; they might perhaps live and rub out in the middle region.

3. (transitive, criminal slang) To kill, especially to murder.
   • 1942, James Thurber, The Catbird Seat:

     It was just a week to the day since Mr. Martin had decided to rub out Mrs. Ulgine Barrows.

   • 2004, David Mitchell, Cloud Atlas

     'Mr Grimaldi,' fills in Smoke, 'what I believe Fay has too much tact to spit out and say is this: the Rey woman might be imagining we rubbed out Dr Sixsmith.'

• 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.

• kill    [WS]

• rub one out