something out of character done during a period in which you are heavily strung out on crack, the crack preventing any good judgment at all....like being in a relationship with a girl you don't even like, and then getting her pregnant
I love my kids wouldn't trade them for anything, but fucking their mother was definitely a "crackcident"
When you are out somewhere and you have to take a crap really bad but you think you can make it home. While driving home you hit a bump and explode in your pants. This is a crapcident.