Mashing of words Incident and didn't.
when some shit almost happened, but didn't.
A situation that could potentially be bad, that turns out ok.
Johhny slips on ice, nearly smashes ipod on the ground, but recovers at the last second: Incididn't.
Dude 1: holy shit! last night i accidentally made dinner plans with two different chicks at the same place!! but one bailed at the last second!!
Dude 2: Shit close call! talk about an incididn't!
Remembering that bag of weed in you jeans pocket seconds before putting them into the wash.