During cunnilingus, the act of using your tongue to draw letters, numbers, or other symbols over her vagina. This is commonly done with the alphabet, but can also be used for spelling out song lyrics or lines of Shakespeare.
I got bored while eating her out, so I started up the Kenosha Typewriter and started spelling out the Pokémon theme. She loved it.
A stretch of time in the early morning, generally around 4 A.M. to 6 A.M., which is either unreasonably late or unreasonably early depending on the context. Used to emphasize how late one has stayed awake, or how early one must wake up.
"We were all up 'til ass o'clock in a call, I didn't get any sleep last night."
"Mark has to get up at ass o'clock to go to work."