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1.
Instead of putting someones hand in water to make them pee you just stick their hand in your pee.
PS: Great for sleepovers.
I put his hand in water while he is sleeping but he insn't peeing. Screw it he's going to get some sour fingers.
by cajk April 10, 2010
 
2.
The act of fingering a woman's ass hole and keeping it in a bottle of milk for 15 minutes and dunking it in the sugar of sour patch kids.
My wife wanted to spice things up a tad and she asked for a Sour Finger... it still smells after 7 months.
by oldgreggg6699 February 18, 2011