And hailing from Hawai’i:
Da kine!
(Can be person, thing, or whatever. I’ve found it helps to use hand gestures when you use this.)
<< Que-sera–sserole! Whatever we’ll have, we’ll eat. In one dish, combine and heat. Que-sera-sserole! >>
hoodgie-doodgie
Ireland:
Yoke*
UK:
Dooflicky
Whoodjamaflip
Nickynackynoonaa
*Also slang for ecstasy tablet.
Lots of them at gimcrack
That thing, in the thing where you put the other things that thing…
In techy geek terms that’s known as “Vapor-ware.”
Ditsels and bobbles (as in hair bobbles)
A guy I used to work with would often use thing as a verb!
Doobleywhat
Flickeydickey
Doomahuncher
All from my dad.
My boss didn’t like me saying “thingie” so I switched to thingummy. He didn’t appreciate that one too much either but it stuck.
Herfle-Derfle
[My mother uses this to describe an unknown ailing body part, as in, “I’m suffering a discombobulation of my herfle-derfle.”]
I have lot’s of “lil’ dilly’s”. You know thos lil’ dilly thing’s I’m talking about right?? 
Does Dairy Queen still have the Dilly Bar? Sort of a rounded Eskimo Pie thing? It’s been many a moon since my last DQ visit.
They DO! I had completely forgotten about those!!
Thanks, Zeldar 
I use thinger (not thingie) all the time, and shwack (or shwacker) occasionally.
You’re quite welcome. I may have to slide by DQ before long and get me one.
It is, indeed. The Widget: favorite industrial output of Econ 101 teachers everywhere.
Thanks for the confirmation. I always enjoyed the properties ascribed to the things. Anything from a big vegan donut to a self-propelled bazooka. Didn’t matter much since it was how many you could make cheaply that was the issue.
Henway
Dickfer
whosiewhatsis
framistan
and the ever popular whatchamacallit have been in my vocabulary for decades