get this party started

1. Literally, to begin doing really fun, entertaining things at or as at a party. Hey, who wants cocktails? Come on, I'm ready to get this party started! The birthday girl's here, so we can get this party started now! Woo! Let's get this party started. Hit it, DJ!

2. By extension, to begin engaging in some action or activity with intensity, determination, or enthusiasm. Welcome to the first session of our aerobics class. Let's do a quick five-minute warmup, and then we're getting this party started! All right, if we win this game, we're going to the championships. Let's get this party started, boys! The two teams are already pushing each other around. Yep, they got this party started right after the first face-off!