Alex Filippenko, an astronomer at UC Berkeley, created a series of astronomy lectures on videotape for The Teaching Company. In the tape he discussed this mnemonic, used for remembering the classes of stars on the main sequence.
The original version is of course:
Oh
Be
A
Fine
Girl,
Kiss
Me
However, he recognized that not all students are interested in having a girl kiss them. But that was easily fixed:
Oh
Be
A
Fine
Guy,
Kiss
Me
But his favorite was one that his students made up, which he was more than happy to relate on the tape:
Oh
Boy!
Alex
Filippenko
Gives
Killer
Midterms
I'm sure his classes would be a lot of fun.