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1. Insulting terms of address for people who are stupid or irritating or ridiculous
    
2. The illegitimate offspring of unmarried parents
   - by-blow, love child, illegitimate child, illegitimate
    
3. 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"
   - mongrel

1. Fraudulent; having a misleading appearance
   - bogus, fake, phony, phoney, cod [Brit]

Derived forms: bastards

See also: bastardize, bastardly, counterfeit, imitative

Type of: disagreeable person, issue, offspring, progeny, unpleasant person, variation

Encyclopedia: Bastard