adj. A reflex initiated before the action takes place. An internal feeling like Spidermans "spidey sense." Your body senses it before it happens. Ultimate super fast reflexes.
Damnnnnnnn! How did you know that I was going to throw the ball at the back of your head.
-I sensed it because I gots mad preflexes, son!
by Kid Quads January 29, 2009
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To flex or stunt before actually receiving the option.
K - Don't worry, you can sit on the leather seats of my Audi when I get it
J - Dude stop preflexing
by Aerodynamix October 29, 2015
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