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1. A term used to represent shaking your fist at someone via the internet
in the sense of an EMOTICON.

2. When using it as a plural (ie. shakeS fist) or as an ACTION, then the proper usage would be "shakes fist" as two SEPERATE words.

1. :shakefist:

2. :shakes fist at (place name here):
by Grammar/Spelling Police September 21, 2005
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