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1.
Means to stop any action, speaking or movement that you are doing.
John: you heard this new song i made ?

Dave: Pull it up man !
by Jampolo January 29, 2010
 
2.
to come up to the band director to hear what he has to say. Often used for the hornline & sometimes drumline.
Pull it up to the tower really quick!
by Sarah August 24, 2008