'a song about mopping' featured in 'death lives'

Quagmire [talking]: Ensign Glen Quagmire. Welcome aboard.
You picked a great day to get rescued.
We were just about to sing a song about mopping.
Quagmire's sea crew [singing in opera type tune]:
We're mopping the deck
which is Navy for "floor"
And when we're done mopping
We'll mop it some more.
Quagmire [in his custom voice] Oh!
[Singing again]: Swab means mop, deck means floor.
[End, interrupted by death's mum but there is no singing in the backgorund, only music]