One who enjoys to and frequently rubs another person's grundle.
Larry is such a grundle rubber, he is always trying to get his hands on mine.
Someone who lives in a vehicle - car, van, RV - if it has rubber wheels and you're living in it then you are a rubber gypsy.
I was a rubber gypsy for half of my twenties - split my time between Arizona, Oregon, and Baja.
Rhyming Slang
Like up ya nose with a rubber hose
Hey Suzie up ya bum with a rubber thumb
The act of cumming in a condom
I did the rubber goof last night