A sharp pain you get in your fingers after you play a long guitar solo or very hard part. Something I get frequently.
I bet Claudio gets fire fingers after playing The End Complete.
by XtfotX January 25, 2009

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Top Definition
Rubbing your finger on the inside of a hot pepper (such as a habanero)or hot sauce and then inserting the offending member into someone else's vagina or anus.
Casey was pissed at his girl so he rubbed some pepper sauce on his finger and gave her a fire finger.
by xterra0915 February 20, 2008

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Rubbing your finger on the inside of a hot pepper (such as a habanero)or hot sauce and then inserting the offending member into someone else's vagina or anus.
Casey was pissed at his girl so he rubbed some pepper sauce on his finger and gave her a fire finger.
by xterra0915 February 20, 2008

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When you stick your fingers in another mans ass so far you get blood and feces on your fingers and wipe it in the mans eyes
I gave that guy a firefingers and his eyes burned for a week
by HOLKANTZ April 30, 2006

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