Noun

1. A sexual activity involving stimulation of a sexual partner’s anus and/or rectum, especially by penetration.

Synonyms

• buggery (legal term; this also has other sexual meanings)
• butt-fucking (vulgar) - US
• butt sex (vulgar) - US
• sodomy (legal term; this also has other sexual meanings)
• taking it up the ass (US vulgar)
• Fudgepacking - (British/New Zealand/US)
• See also Wikisaurus:anal sex