A group of individuals make a Dumgreement on a very stupid plan or decision. Whoever is in charge convinces others it is a good idea. Blindly following the genius who thought of the idea even though it is stupid, a moron
mob forms and carries out his plan. The plan backfires, unforeseen repercussions
piss a lot of people off and the moron
mob makes another dumgreement and decide the
best thing to do is deny involvement and lie about everything.
If you make a Dumbgreement before thinking it through bad things
will happen, be prepared to cover up your stupid plan.