(historical) The chaotic period following the opening of Indian territory to settlement in 1889 as the US state of Oklahoma.

(colloquial, of a person) Extremely busy.

Rhynchospora scirpoides, reported in scattered parts of the eastern United States

A person who does not plan ahead and think matters through becomes involved in risky or unfavorable situations which prudent people avoid.

A famous mountain in the Black Hills with the heads of four US presidents carved into it.

(by extension) The four most important people in a particular field or category.

A person who rushes. / (American football) The fast defensive position whose objective is to sack the offensive team's quarterback. / (obsolete) One who strews rushes.

(of a marsh etc) abounding in rushes / having the characteristics of a rush (the plant); rushlike

Characterised by rushing; hurried; fast-paced

plural of rusher