the term was coined in 2003 as a result of a discussion on the language log website, in a discussion about a woman who misheard the word acorn as eggcorn.
now, show of hands: how many of you saw the title and the thumbnail, and thought, hold on a second. that's not right. eggcorns are a telling little eddy in the flow of communication, in which apocryphal definitions can become true as common use redefines reality. sorry to involve you in my little experiment all unwittingly; but i do find it terribly interesting how many people would catch, or accept, i'm doing just grate, thanks.