Asshole, or ass, are slang words for the anus, an orifice on the bodies of more complex animals for the purpose of purging waste. British English speakers tend to use the equivalent terms arsehole, or arse.
It can also be an extremely apt metaphor for an individual who regularly spews forth bullshit. I.e., "they're talking out of their asshole" or "they've pulled that fact out of their asshole".
 See also
- ↑ Well, the "ass" is the whole ass, the "asshole" is just the hole.