Bullshio is a derogatory term used by some English-speaking martial arts aficionados to describe fraudulent, deceptive, or inept martial arts teaching. It is a portmanteau of bushido, the samurai code of honor, and bullshit. Bullshido is considered to be the antithesis of bushido, and is generally applied to martial arts schools where their instructors publish pseudoscientific claims or unverifiable assertions concerning their lineage or training methods, or emphasize blatant commercialism over substance in teaching, training, personal conduct, or business dealings.