Webster's Revised Unabridged Dictionary · 1913

Topper

Topper , noun

1.
One that tops, in any sense of the verb;
(a)
A cover of a top layer or part.
(b)
One that excels, surpasses, or is extraordinary of its kind.
(c)
Any device for cutting off tops; as, a turnip topper.
(d)
One who tops steel ingots.
(e)
A three-square float (file) used by comb makers. [Colloquial; Slang]
2.
A top hat. [Slang or Colloquial]
3.
Tobacco left in the bottom of a pipe bowl; -- so called from its being often taken out and placed on top of the newly filled bowl. Also, a cigar stump. [Slang]