Do-dah

Substitution word for a person, place or thing whose actual name escapes you at the moment.

Sandra: "Hand me the do-dah."
Mike: "Do you mean the potato peeler?"

Mike: "Are we cooking dinner tonight?"
Sandra: "No, do-dah is."

Ugimi Do-Dah

The perfect storm of disorganization and improvisation where plans fall apart, and sheer creativity (or desperation!) takes over.

Stevo walked into the meeting room, only to find his team in the midst of an Ugimi Do-Dah. Papers were scattered everywhere, and everyone was frantically typing or arguing over the whiteboard. Stevo sighed, knowing they'd be winging it until the presentation.