Asshole

Asshole or arsehole
EtymologyCompound of ass or arse and hole
Definition
In a literal senseAnus
FigurativelyA stupid, incompetent, unpleasant, or detestable person

The word asshole (in North American English) or arsehole (in all other major varieties of the English language) is a vulgarism used to describe the anus, and often used pejoratively (as a type of synecdoche) to refer to people.