The point of shamsher is to confuse someone, by pointing at either their feet, or the floor down beside them.
In doing so, you may have them confused and looking at one spot, while you walk past them (e.g to some out-of-bounds place)

Another purpose is to make them look stupid, and attack their self-confidence by putting them of the defensive.

It's is especially funny if you 'Shamsher' a teacher, one that is preferably going somewhere in a hurry, or to lunch at the end of class, it will produce hours of laughter after class with mates who already know about shamshering.
Scene from "Freddy Got Fingered", near middle of Chapter 2 on the DVD.

*Metal Detector rings*
Black Dude: Uhh can I help you?
Black Dude: Excuse me!
Black Dude: Can I help you?!!?
Black Dude: 'cuse me!?
Gord/Tom Green: Uhh, it's ok im here with the bag,
Black Dude: The bag?
Gord/Tom Green: The, the bag for thee, uhh, eels...
Black Dude: Whut?
Gord/Tom Green: It's For the Badger, for the badger...
Gord/Tom Green: It's for the...
Black Dude: Whuut?
Gord/Tom Green: It's for the Shamsher...
Black Dude: Whut?
Gord/Tom Green: It's for the Shamsher right there...
Gord/Tom Green: It's for the shamsher...
Gord/Tom Green: It's for the...
Black Dude: Hey, HEY!
Gord/Tom Green: It's ok, it's for-
Black Dude: What are you talking about??!
Gord/Tom Green: I'll be back, Japan 4.
Black Dude: Are you here for delivery?
Gord/Tom Green: J-japan 4...!
Black Dude: Japan 4???
Gord/Tom Green: Shamsher..,
Black Dude: Whh,ut?
Gord/Tom Green: Shamsher.

Black Dude: Japan...4...
by James3k September 3, 2005
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The meaning of Shamsher is - Pointing at a person's feet saying this term, when there is nothing there of course, just a simple trick
"you just stood on it!"
"stood on what?"
"the shamsher, its right there"
by Blair Delaney September 3, 2005
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