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1.
Let's do this. Let's get it poppin. Let's get it crackin.
Porsche': "Man we bout to go have fun!"
Kari: "Let's get it!"
Shauniese: "Woot Woot!"
by Perqergan July 29, 2009
 
2.
letting someone know that you mean business and you are pretty much up for anything at any time. also meaning that you are ready to do work on people. the act of getting something.
john is preparing to go into a heated situation. you then step in and and say "lets get it"

John: i saw a bunch of mad chill biddies down by the pier.

Matt: Yo! lets get it
by alpha beta goosy June 29, 2010