What type of person says: ".. and WhatNot" at the end of a sentence ?

It's a 'verbal tic'. Some say "whatever" or "like" a lot. Just a bad habit.

In my experience this phrase is certainly a feature of American English rather than British English, but I haven't noticed whether any particular 'type of person' uses it.

I'm in America and I hear VERY FEW people use it. Almost none, in fact. Maybe Americans in England say it or maybe some English people assume that anyone who says something weird must be American.

It's an alternative to "so forth" or "etc" and has no particular occupation or stratum of society with which it is associated or used.

It's used by people who don't want to appear snobbish by using Latin phrases like etc. or et al.

I would disagree with the first answer in that most people who who say "like" & "whatever" pepper their sentences with those words; as in nearly every sentence they utter has like or whatever or both in it.

Whereas "whatnot" is not used nearly as liberally and serves a specific purpose: "They served oranges, apples, grapes, and whatnot." You know the "whatnot" means various other types of fruit.

I would say that "whatnot" is used by stockbrokers, rednecks, and pretty much every class.