I was in a HOme Depot once, and a fellow asked the kid "where’s a blade for my Sawsall?
That was the first time in 30 years I had heard that name used generically (or maybe he really had a Milwaukee saw). I translated it to 'reciprocating saw" with a note that a Sawsall was the first to market a recip to the homeowner trade, and a fe people use it to mean any recip.
Yeah, I know, somebody released a cheap recip a week before Milwaukee saturated the ad world with “Sawsall”.
Linoleum, Styrofoam, Scotch Tape.
“Bobcat” for skid-steer loader.
Me too.
I always think of those as “nippers”.
When I learned to drive 18-wheels years ago, my instructor said that if I could drive a Peterbilt, I was golden; if I could drive a Kenworth, I was silver; and if I drove a Mack (or GM or Ford or Western Star), I was just another guy.
I learned on Kenworth, and I finished driving Kenworth. So I guess I ended up doing pretty well.
Good call. I learned how to opeate a Bobcat some years ago, and have yet to find anything that can do what a Bobcat does.
This is more likely to be a JCB in the UK (hence the difference between the UK and US editions of Terry Pratchett’s Diggers)
We did, too; they’re interchangeable.
There was a time when all old black square cars were called “Model Ts”, which was a Ford brand. Another example is Levis.
I just completed a 1400-mile mostly Interstate trip, on which I spent time surveying the trucks I saw. Some observations:
At least 95% have the standard 18-wheel configuration described in post #2.
A few have 22 wheels, attributable to a third axle (with four wheels) on the trailer. As you’d expect, this correlates with hauling heavy loads (e.g. a bulldozer).
Some nominal 18-wheelers - presumably lightly loaded, or empty - have one of the two semi-trailer axles jacked up, out of contact with the road. So these qualify as 14-wheelers.
A few “bobtail” rigs have 10 wheels: 6 on the tractor and 4 on the semi-trailer.
I saw one rig with more wheels that I could count. It was hauling a super-heavy load (looked like a giant pressure vessel) and looked something like this.
I saw nothing that would qualify as a 20-wheeler - and I’m not sure what that would look like.
I can’t imagine a 20-wheeler, since all axles have four wheels except the front axle, for steering, so any configuration would be a number that is 4x+2 – in other words, woulld never be a number divisible by 4.
One of the companies that my brother drove for hauled wood chips. They had triple axle trailers with four tires on the rear two axles and two tires on the front trailer axle. Those trailers, when used with a standard ten wheel tractor, became 20 wheel trucks. Weird rigs those. The front trailer axle could have had four tires mounted on it. I would guess it was done to save the cost of two more tires. At more then $250.00 each, it adds up. From the side and rear, they would look like they had 22 tires.
Just goes to show that one should be very careful when saying “never” or “always”.
Until I read your post, I hadn’t even realized Sheetrock was a brand name.
Mack’s are all huge dump trucks. Big rigs are all Peterbilts or simply Petes. 
Anyone else object to the generality “gun”? More to the point, every lever action is a “Winchester”, every pistol either a “Colt” or “Smith”.
I don’t see those often, but I saw one on the way home yesterday. The trailer was placarded ‘SINGLE AXLE TRACTOR ONLY’, so it was only to be used on a tractor that had one set of wheels on the back.
I saw the winkie, but FWIW I was in front of a Mack semi yesterday. 
Any form of home wrap = Tyvek
Here’s a Mack “big rig” tractor for hauling semi-trailers.
Saran Wrap for plastic cling wrap.
Post-It for sticky-back notes.
ChapStick for lip balm.
Astroturf for artificial turf.
Levis and Coke are the first two I thought of, but I think those are more a Southern thing.
Tissues - Kleenex