Frig is not a word many people use for masturbate. It is what I grew up with because my mother used it.
Our use of the word 'frig', correctly detonates the English origins of my mother's ancestry.
This excerpt comes from here: <a href="https://www.atlasobscura.com/articles/whether-you-say-freakin-frig...
You might notice we haven’t talked much about “friggin’” yet, and that’s because “friggin’” is not quite like the others. From the 15th century until the late 16th century, “frig” was an innocent verb in English, meaning to move rapidly, to rub, or to chafe. It was its own word, entirely unlike “freaking” and “fricking... » Read more