martha barnette, of http://www.funwords.com/ fame, told me that she, too, investigated this fugitive word a few months ago and came up dry. she did offer this:

"I did come across "interjaculate: to ejaculate in the midst of a conversation; to interject (an ejaculation)." But hmmmm, that's not exactly it and it sounds too naughty anyway!"

i think she'd be a terrific addition to the board

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what about something along the lines of 'cacoethes interrupti'? it *is missing an essential defining element (finishing the thought), though. is there a word better suited to the concept than interrupti? (and is interrupti even a word?? [dunce-e])

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+) i find it irritating when done in an habitual way, and relieving when done in response to my genuine aposiopesis.