The word you are grasping for, Del, is hyperbole. The statement uses exaggeration as a rhetorical device or figure of speech. It may be used to evoke strong feelings or to create a strong impression, but is not meant to be taken literally.
(this was freely stolen from Wikipedia, so it HAS to be true)
As for 8/8 broken, I can attest to those. I've even seen a yew longbow do what I believe to be a 9/8th trick. Some bits even penetrated sheetrock, luckily no one bled out.