Unparliamentary language

In Parliament, one of the functions of the Speaker of the House is to enforce the assembly's debating rules, one of which is that members must not offend the dignity of the assembly, suggest another member is dishonest or dishonourable, or use profanity:  Some words that have been banned:

• blackguard - A scoundrel; an unprincipled contemptible person
• coward
• git - silly, incompetent, stupid, or annoying. It is more severe than twit or idiot but less severe than wanker or arsehole.
• guttersnipe - A person from the lowest social or economic class; a street urchin.
• hooligan - A person that causes trouble or violence.
• ignoramus - An ignorant or stupid person.
• liar
• rat
• swine
• stoolpigeon - A police informer, or criminal's look-out or decoy.
• tart - a prostitute.or a promiscuous woman
• traitor
• sod - an idiot, moron, or annoying person (from sodomite)
• slimy
• wart

Some MPs, such as Winston Churchill, have considered it a point of pride to insult their opponents without the use of unparliamentary language, including:

• Terminological inexactitude (lie)
• Being economical with the truth (lying by omission)

Recently, one MP accused another of being drunk, but instead used the word "incapable." The Speaker requested she withdraw her comment, citing unparliamentary language.  Later, the accused admitted he had been drunk at the time.