Etymology

The term buggery originated in medieval Europe as an insult used to describe the rumoured same-sex sexual practices of the heretics from the Buggre sect. This sect originated in medieval Bulgaria, where its followers were called bogomils, but when they spread out of the country they were called buggres (from ethnonym Bulgars).

Noun

1. Anal sex between men.
   • “Whosoever shall be convicted of the abominable crime of buggery…shall be liable at the discretion of the court to be kept in penal servitude for life or for any term not less than ten years.” Prior to 1861, the offence carried the penalty of execution. (UK) Offences Against the Person Act 1861. (The offence of buggery between consenting adults was repealed by the Sexual offences Act of 1993).
2. Any sexual act "contra naturam" including bestiality and necrophilia.
3. A broken or damaged condition.

   It's gone to buggery.

4. An extreme condition.

   It hurts like buggery. Run like buggery.