bastard

Adjective

• fraudulent; having a misleading appearance

Noun

• derogatory term for a variation that is not genuine; something irregular or inferior or of dubious origin
  • the architecture was a kind of bastard suggesting Gothic but not true Gothic
    

• the illegitimate offspring of unmarried parents

• insulting terms of address for people who are stupid or irritating or ridiculous

Related words

• Synonyms: 
  bogus , fake , phony , phoney , mongrel , by-blow , love child , illegitimate child , illegitimate , whoreson