An e-mail containing an attachment as a corrective follow up to the original message it was supposed to accompany.
Usage: Often a public proclamation to the world that the wrong has happened and been righted. Equally used by the offending and receiving parties.
Origin: Circa 2007, staff at the Idealist.org Portland, OR office felt it necessary to come up with a word for this embarrassing, yet all too common work life occurrence.
At any time in our office you might hear someone exclaim, "Flambosure!" and know that they had either committed or witnessed an attachment being sent after the fact.