Question about fracture, skill speed, and clipping.

[Saseal]

So, I have a stupid question >_<;;;; DPS is something of a second hand job for me, and my main WHMing... so I'm slightly behind on dps terminology, etc x.x

What exactly is 'Clipping'? I'm assuming it's when you fire off another skill before the prior used skill completed it's animation? Using bard for example, (since I do this now and then on my secondary character) - like jamming Misery's End right right before BLoodletter finishes it's longer animation? (or, I guess, BLoodletter or Misery's End after any used skill...)