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2.
The slowest possible motion to still be considered moving forward.
The cliffs surrounding Niagara Falls are actually eroding at percy-speed.
by JohnnyDago February 26, 2008
 
1.
Abnormally slow, apathetic human movement.
It took an hour to clean the boat because Dave was moving at percy-speed.
by Donkey81 February 25, 2008
 
3.
Percy-speed v(P) is defined by...
v(P) = Pm/r² , where:

P = the percy-speed constant = 7.3635
m = your mass
r² = your distance at any point in time from Percy

Essentially, the further you are from Percy, the faster you move.
The bartenders at Segafredo serve at percy-speed.
by Jeff81 March 31, 2008