Captain Jack Sparrow is a fictional character in the Pirates of the Caribbean film series.
According to screen writers Ted Elliott and Terry Rossio, Sparrow is a trickster who uses wit and deceit to attain his goals, preferring to end disputes verbally instead of by force. He walks with a slightly drunken swagger and has slurred speech and flailing hand gestures, which are slightly based on Tuco from The Good, The Bad and The Ugly. Although Barbossa does not respect him much, as evidenced by naming his monkey Jack, Sparrow is shrewd, calculating, and intelligent.
Source: Wikipedia, "Jack Sparrow", available under the CC-BY-SA License.