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the process of surprising somebody by means of moustache. the victim of a Mo-sprise is generally unhappy in receiving the sudden shock that can result in the unexpected change in an aquantances facial hair-do.
a classic example of Mo-sprise is when one grows a beard to disguise the attempts of growing a moustache. when the moustache is in full bloom the cultivator shaves his/her beard leaving only the top lip unshaven.

a victim is then selected and upon greeting they are "Mo-sprised" when they notice the moustache that has grown, somewhat exponentially on the face of the offender.
by Carl Bluestorm May 26, 2010