Douglas Harper's Etymology Dictionary
muckluck
also mukluk, 1868, "sealskin, sealskin boots" from Eskimo maklak "large seal, sealskin." Meaning "canvas boots that resemble Eskimo ones" is from 1962.
Usage examples of "muckluck".
A paw whipped out and slashed through his breeches above his left muckluck, into the flesh of his thigh.
Chewing on a muckluck sole, And the sun comes up at midnight From an ice-pack round the Pole.
His mucklucks were laced above his knees, his hunting knife hung from his belt, and his snowshoes lay underneath him, keeping him from sinking down into the five foot drifts.