Pell-mell (adverb)

1. In confusion, disorder, or with headlong haste; in a headlong or disorganized manner.
2. In a chaotic or disorganized way, especially with a sense of haste or urgency.

Origin:

From middle english pelle mell, literally means headlong, headfirst, in confusion, or in disarray.

Examples:

1. The crowd rushed pell-mell out of the building.
2. The children ran pell-mell down the street.
3. The conference attendees left pell-mell after the meeting.
4. The documents were thrown pell-mell into the box.
5. The plans were made pell-mell with little thought for the consequences.