What are the antonyms for Hackest?

• adj.

  • common
  • abnormal
  ,
  • aristocratic
  ,
  • cultured
  ,
  • different
  ,
  • excellent
  ,
  • exceptional
  ,
  • extraordinary
  ,
  • high
  ,
  • infrequent
  ,
  • nice
  ,
  • noble
  ,
  • noteworthy
  ,
  • rare
  ,
  • refined
  ,
  • rich
  ,
  • scarce
  ,
  • sophisticated
  ,
  • superior
  ,
  • uncommon
  ,
  • unusual
  ,
  • valuable
  ,
  • wealthy
  .
  • inferior
  • best
  ,
  • better
  ,
  • extreme
  ,
  • first-class
  ,
  • first-rate
  ,
  • foremost
  ,
  • good
  ,
  • honest
  .
  • mean
  • compassionate
  ,
  • elevated
  ,
  • generous
  ,
  • kind
  ,
  • moral
  ,
  • polite
  ,
  • sympathetic
  ,
  • unrestricted
  ,
  • unselfish
  .
  • second-rate/second-class
  • great
  ,
  • wonderful
  .

Well up on is typically used to describe someone who possesses a great amount of knowledge or expertise on a particular subject. However, there are several antonyms for this phrase...