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2.
A derogatory term used to describe someone who is less than satisfactory in their behaivour. Originated from the middle finger of a female, which is normally used to insert into their vagina or anus to pleasure themselves. Normally, has sticky residue and horrific odours as a result of not cleaning it.
You fuckfinger, why the hell did you root my nana!?
by Bonecrusher August 22, 2003
 
1.
Your middle finger. The finger you give the finger with. Also possibly the finger you digit-fuck someone with.
He put out his hand and extended his fuckfinger right in my face.
by jochanan October 26, 2010