ˈchapˌ- also -ä- adjective
or chop·fall·en ˈchäpˌ-
Etymology: chap (V) or chop (IV) + fallen
1. : having the lower jaw hanging loosely
a tired and chapfallen hound
2. : dejected , depressed
sallied forth … with an air quite desolate and chapfallen — Washington Irving