When selling a product, the marketing folks would come up with an easy to remember tag line that describes something about the product that's easy to recall.
MooTools : http://moofx.mad4milk.net/
JQuery : http://jquery.com/
Plotr : http://www.solutoire.com/plotr
It's almost like saying Prototype, Scriptaculous, YUI and Dojo are bloated ;-)