Kibble....and bits and bits....

Ok--I'm 31--and of course when G1 came out I was 8 or 9 years old, so I'm pretty familiar with the whole original Transformers story. Anyway, I've gotten back into collecting--I unfortunately don't have any of my originals, ie I had ALL the Predacons, Soundwave, a couple of Insecticons, whatever--somewhere along the line they all disappeared, ending any Ebay bids I might have had.. However, I haven't kept up with all the recent generations like Cyberton/Beast Wars, etc...but can someone PLEASE define KIBBLE for me? I read it all the time in reviews & stuff... I'm assuming it's all the extra plastic/crap that's left over after you transform a figure.. Can someone confirm this for me?? Sorry for the long post, but I'm excited about getting into the fray again...