1.NounA small unspecified object; bric-a-brac (in plural).
2.NounOther related objects or ideas.
"At the lexicography club, we welcome all discussion of words and whatnot.; All of the cakes and whatnot have been laid out, ready for the children's birthday party this afternoon."
3.NounA freestanding set of shelves on which ornaments are displayed; an etagere.