rap1
  
  v.
 (raps, rapping, rapped)
    - strike (a hard surface) with a series of rapid blows. 
▸strike several times against a hard surface.
 ▸strike sharply.
 - 
(usu. rap something out)
 say sharply or suddenly. 
▸informal criticize severely.
 - informal, chiefly N. Amer. talk or chat in an easy and familiar manner.
 - perform rap music.
 
n.
     - a quick, sharp knock or blow.
 - a type of popular music of US black origin in which words are recited rapidly and rhythmically over an instrumental backing.
 - informal a rebuke or criticism.
 - informal, chiefly N. Amer. an impromptu talk or discussion.
 - N. Amer. informal a criminal charge:
 a murder rap.
 
 
  Phrase
  
    - beat the rap
 N. Amer. informal escape punishment for or be acquitted of a crime.  - take the rap
 informal be punished or blamed for something. 
   
  Derivative
  
  Etymology
  ME: prob. imitative and of Scand. origin.
 
  
    
rap2
  
  n.
 the smallest amount:
 he doesn't care a rap.
 
  Etymology
  C19: from Ir. ropaire ‘robber’; used as the name of a counterfeit coin in 18th-cent. Ireland.