Drivers side - self-explanatory
Coach (or patio) side - the side of the RV that has the entrance into the "House" (living space of the RV, be it a trailer or MH)
Class A - a motorhome where you're not looking out over a hood with an engine under it and it has an expensive windshield (should it need replacing).
The difference between a Class C and Class B/B+ is the cabover. The Class C's cabover area is a sleeping berth. The Class B/B+'s cabover is more aerodynamically streamlined with the cab for better fuel efficiency and is for storage and/or an entertainment center.
FW (or 5er) - Fifth Wheel trailer
pull trailer (or bumper pull trailer) - same as a travel trailer
FT - Full Time
FTer - Full Time RVer
genset - (auxiliary power) generator
Some times you might hear someone say "coach" or "house" instead of "RV". As in: "Come over to my coach and I'll show you the leak." They are talking about their RV - whether it be a MH or trailer.
I live fulltime in my MH. When I'm staying in an RV park I generally don't refer to my MH as my RV or refer to my RV site (or site # even). It's a mindset thing, because where I'm parked - for as long as I'm parked there - that site, that patch of earth is my home. I am more likely to say "Come over to my house." or "I'm going home to make dinner."
