(golf, dated) A metal-headed golf club with a moderate loft, the equivalent of a five iron in a modern set of clubs.
Florence L. Harvey (1916-01), “Chilly Days and Muddy Courses”, in Golfers Magazine, volume 28, number 1, Chicago, page 9: “Do not think that is because I do not value a mashie, on the contrary it is my favorite club and one with which I am far surer than any other, in dry weather.”