What does Boxing Day have to do with boxing?
early 13c., "slice of bread; thin piece cut off," perhaps from an unrecorded Old English *scifa, cognate with Old Saxon sciva, Middle Dutch schive, Dutch schijf, Old High German sciba, German Scheibe; see skive (v.1). From 1869 as "thin, flat cork for a bottle."
: something better than shitwork jobsnoun
Menial and tedious work; degrading routine work; scut work: the boredom, the shitwork, the perpetual deadlines (1960s+)