American Heritage Dictionary
(2)
Century Dictionary
(2)
GNU Webster's 1913
(1)
WordNet
Elsewhere on the web
"I lived in a humpy," Anderson tells me matter-of-factly when I inquire about her early years growing up in the desert.
"I loved going to school from that little humpy," she continues.
Almost on the verge of the steep-to wall of rock was a large and regularly built "humpy," in which Douglas Fraser and Kate lived.— Tom Gerrard
He had bought an empty humpy, and, instead of getting tight, Why, the diggers heard him working like a lunatic all night: And next day a sign of canvas, writ in characters of tar, Claimed the humpy as the office of the CAMBAROORA STAR Well, I cannot read, that's honest, but I had a digger friend Who would read the paper to me from the title to the end; And the STAR contained a leader running thieves and spielers down, With a slap against claim-jumping, and a poem made by Brown.— In the Days When the World Was Wide and Other Verses
We got straight on to the big pressure waves, and headed for the humpy rock at the base of the Cloudmaker.— The Worst Journey in the World Antarctic 1910-1913

Century Dictionary (2)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a year.