What is this problem called and what causes it?

[nrbelk]

I came home to a failed print today. Most time when I have failed prints its just a bunch of spaghetti but this time there was a funky smell and I came home to this large "turd". I wasn't home to see what causes it. If someone knows please point me in the right direction to fix it.

thanks

[Mac The Knife]

It prolly broke loose from the bed, and stuck to the hotend for a while.

[Jimustanguitar]

Sometimes you get to name the failure I vote for calling this one dairy queening.