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1.
to have erection
Oh, I'm pumped up!
by cisar June 17, 2009
 
2.
To be pregnant. It comes from the physical appearance of the female's stomach being "pumped up" like a balloon or another round object filled with air.
To be used in the same manner as the word "pregnant":
"She has gone and gotten herself pumped up!"
"Carla is pumped up!"
"When are you going to get pumped up?'
by Niki Yo October 04, 2010