Bone idle - Someone who would rather die of dehydration than get up and get themselves their own drink.

Referring to the heavy unfashionable winter jacket and patterned mittens Sanders wore to the inauguration of Joe Biden.

Bone idle? Only one thing comes to mind:
Onslow

This is the absolute in laziness; this behavior goes all the way to the bone. A complete and utter sloth who will watch bowling rather than reach for the remote. Usually found in the company of slackers and snackers.

constitutionally lazy or idle