what did the car wax say to the furniture wax?" ... "Now stop that, you know we can't do polish jokes here."

Reminds me of the comic set in a newsroom... man says into phone "He's not here, he's out waxing poetic." The next frame shows a man polishing a car and the license tag reads "Poetic."

Skivvy :[ according to OED - "(noun and verb) a female domestic servant; a person whose job is regarded menial or poorly paid; (noun) underwear comprising vest and underpants; an undershirt or vest; a thin, high-necked pullover."
In my youth the word skivvy implied that the person (male or fenmale) was uneducated - perhaps only able to write their name - if that - and more probably unable to read or write, often an immigrant who barely spoke English. The skivvy was often taken advantage of by mean employers.
And I mean "mean" in the meanest way!!!!
In some ways, times haven't changed much have they?