Here's an interesting perspective on Whatchamacallits and PayDays that I stumbled upon years and years ago while I waited patiently for a seemingly never-arriving lunch order in a small neighborhood diner and during which wait I was afforded the captive luxury of lustily and longingly studying the box of candy bars behind the serving counter:

Hershey’s has the syllables color-coded. This allows cognitive perceptual rearrangement, both subliminally and consciously. Let's follow the conscious route:

1) select the first two light colored syllables: What + ma ;
2) and then visually select the two dark colored syllables: cha + call ;
3) append the suffix it ;
4) Put it together and what have you got? What ma cha call it...Want mo chacallit...Want more chocolate ...as if chocolate were not already addictive enough!

OK. So WhatmachaCallits, I mean, Whatchamacallits  and the possibility of a subliminal advertising conspiracy require too many tortuous syllabic slurrings and too much cutesy-psychobabble, right?

Are you rather looking for a good, simple, and clean American candy bar that any working man or woman can identify with?

Try:

With PayDay, what you see is what you get.  No cutesy-psychobabble.  I mean...look at the wrapper: What are most of us working stiffs working for anyway? ...RIGHT !