blag vs rip something off

blag

verb
  • To obtain (something) for free, particularly by guile or persuasion. 

  • To obtain confidential information by impersonation or other deception. 

  • To pick up someone. 

  • To deceive; to perpetrate a hoax on. 

  • To obtain something desired, or avoid an undesired outcome, through luck or improvisation; To fluke or get away with something; To wing it. 

  • To inveigle by persuasion. 

noun
  • A means of obtaining something by trick or deception. 

  • An armed robbery. 

intj
  • An onomatopoeia for the sound of a falling strike. 

adj
  • Fake, not genuine. 

rip something off

How often have the words blag and rip something off occurred in a corpus of books? (source: Google Ngram Viewer )