The term "nick" has multiple meanings depending on its context.
1) As a verb, to nick means to make a small cut or dent in something, either accidentally or intentionally. For example, "I accidentally nicked my finger with the knife."
2) Nick can also refer to a shortened version of someone's name, especially if it is an informal one. For instance, "My friends call me Nick instead of Christopher."
3) In sports, particularly in cricket and golf, nick refers to the sound made by the ball hitting the edge of the bat or club, causing a stroke that may result in runs being scored.