Wiktionary
chumpy
a. 1 short and fat, particularly in comparison with something of more favourable dimensions. 2 (context slang of a person English) blockheaded; dim-witted. 3 (context slang mildly insulting English) Like a chump; annoying.
Usage examples of "chumpy".
Always waiting for the hapless few, like this poor chumpy kid, to come in with their hopes sky high and their guards down.
Chumpy, getting out a burp gun, went over and sat down on the floor back of an island of boxes, in profile and in full view of Heller.