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Meaning you really want to hit someone so your finger inches to slap someone like in romeo and juliet.

or in more current times an itchy finger is saying i want to pull the trigger on this gun and kill someone.
Storti: give me the drugs

Griffith: nahh not till you give me the money

Storti: hey bitch i gotta itchy finger for blood right now so just give me my shit.
by womantor June 01, 2009
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the most annoying itch
more annyoing than itchy ballz and obviously horrible spelling errors
omfg!itchyfingerz are t3h suk!
by DFS February 12, 2005
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