It is spelled differently from crackin, although still having the same meaning, because the original word has the letters "ck" standing for cripkiller.
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.
I was rushing to the toilet but did not make it and had a crapcident in my shorts.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."