by gum

by gum (not comparable)

1. (UK, New Zealand, minced oath) by God
   • 1881–1882, Robert Louis Stevenson, Treasure Island, London; Paris: Cassell & Company, published 14 November 1883, →OCLC:

     “You mean all’s lost?” I asked.
     “Aye, by gum, I do!” he answered.

   • 1937, Rodgers and Hart, “Johnny One Note”:

     Couldn't hear the brass / Couldn't hear the drum / He was in a class by himself, by gum!

• See Thesaurus:wow

• gumby