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1.
when the addiction to your cell phone causes u to be able to type 1000 words a min with out lookin watchin tv
Look at crackfingers alex on her phone again while watchin cake farts
by fake name 2010 June 06, 2010
 
2.
Callous on the inside part of the top joint of the thumb, due to excessive flicking of your Bic. Slang common amongst suspicious psychiatrists.
Dude, my shrink accused me of having crack finger, even though he knows I'm a chain smoker.