gasser
n.— «After testing his pulled thigh muscle in a morning workout and running the gassers [a series of all-out 40-yard sprints] that conclude each morning’s chores in the home of the World Champions, Csonka told a writer: “I’ll play in the All-Star game.”» —“Csonka says he’ll be ready” in Miami, Fla. Chicago Tribune (C2) July 24, 1973. (source: Double-Tongued Dictionary)