Usually a sound that happens when something bad happens, usually it's as music but some people actually say "DUNDUNDUN" when something bad happens just to be funny.
Pregnant wife says to husband: MY WATER JUST BROKE!!
n. Velcro laced shoes, mostly worn by preschoolers and retards; some extremely laughable kicks ;
adj. To be so blatantly stupid that one cannot tie their own shoes.
"What's good, been a long time! Last time I seen ya was back like in grade school, you was rockin them corny ass durundunduns!"
"Wow, I was so wasted I can't even remember calling you, I said what?!? Damn, I better be easy, before I end up one them durundunduns try pushin circles into squares!"