the brink, as of a cliff.
any extreme edge; verge.
on the ragged edge, in a dangerous or precarious position; on the verge or brink of: on the ragged edge of despair.
Origin of ragged edge
An Americanism dating back to 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for ragged edge
They are mostly on the “border-land,” if not on the “ragged-edge” of insanity.The New Avatar and The Destiny of the Soul|Jirah D. Buck