To "talk to", "see", "hook-up with" or date multiple guys on a regular basis, usually without them knowing. Similar to being a player or a pimp. Basically it's just guys getting a taste of their own medicine. Can also be used to describe having multiple booty calls. This phrase dates back to the Summer of 2003 when a wise woman named Kreiny said to me..."we're too good for this; we need to stop focusing on one asshole and start juggling some balls".
I was only hooking up w/G but he was dicking me around so I decided to throw a couple more guys in the mix. Now I'm juggling balls.