the.com/whatnot

means A catch-all placeholder standing in for other unspecified things of a similar kind — the verbal shrug at the end of a list.

from A straightforward 16th-century fusion of 'what' and 'not,' originally posed as a real question — 'what not?' meaning 'what might there not be?' — before it hardened into a single word and settled into its current job as the lazy last item on any list. It later picked up a second life as the name for a decorative shelf-stand meant to hold miscellaneous small objects, which is honestly just the furniture version of the same shrug.