(idiomatic, not used in plural form) An obscenegesture, typically consisting of extending the middle finger at somebody.
Wiktionary
The-finger Sentence Examples
What are you going to do with the finger?
He told her they had found the finger and it later turning up missing.
He rose to leave and then added, Whatever the age of that skeleton, the facts still remain that someone swapped the bones, someone stole the finger and 'metalman29' was offering an inflated price for the mine.