"YUP," the other man continued industriously to soap his saddle, "an' you better not cross afore noon tomorra.
"We Were There at the Oklahoma Land Run"
James Arthur Kjelgaard
The lightning, called "YUP-YUP," is also a hog, and always accompanies Ki-cho'.
"The Bontoc Igorot"
Albert Ernest Jenks
A curious American colloquialism, of which I certainly cannot see the advantage, in the substitution of "yep," or "YUP" for "yes," and of "nope" for "no."
"America To-day, Observations and Reflections"
William Archer