Subprime silliness, nailed by two comedians back in 2007. (As opposed to being explained by the comedians who came up with sub-prime and were still defending it back then.)
For non-UK readers, the chaps in the video are the always excellent Fortune and Bird, who often speak more the truth in their rambling obfuscations. MBEs ahoy, I say!
The BBC has ran a more serious explanation of subprime [1]mortgages [1] in easy-to-get diagram form, if you’d like to know more. Or go back to the funnies with this Seven Sins sub-prime meltdown summary [2].