[n] a series of unexpected unpleasant occurrences; "a rash of bank robberies"
[n] any red eruption of the skin
[adj] marked by unthinking boldness; with defiant disregard for danger or consequences; "foolhardy enough to try to seize the gun from the hijacker"; "became the fiercest and most reckless of partisans"-Macaulay; "a reckless driver"; "a rash attempt to climb the World Trade Center"
[adj] imprudently incurring risk; "do something rash that he will forever repent"- George Meredith