pell-mell
1. [ adverb ] in a wild or reckless manner
Synonyms: harum-scarum
Examples:

"dashing harum-scarum all over the place" "running pell-mell up the stairs"

2. [ adjective ] with undue hurry and confusion
Synonyms: helter-skelter
Examples:

"a helter-skelter kind of existence with never a pause" "a pell-mell dash for the train"

Related terms: hurried
Similar spelling:   pall-mall