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1.
A phrase made popular by Will Smith in "Men In Black",which can be used to decribe one's reaction to a strange situation.
Even After I smoked a bowl of marijuana during the movie "Eraserhead",it still ranks about a 9.5 on the weird shit-o-meter.
by Vagina Coastguard December 14, 2003
 
2.
(n) A measure of how peculiar something or someone is.
That guy with the split tongue is offscale on the weirdshitometer!
by Heptune May 13, 2005