D

1. The fourth letter in the Roman Latin alphabet, used in several languages, such as English, French, and many others.
2. Common shorthand for 'dick'. It started as a way to be a bit more subtle, but nowadays everybody knows this way of referring to the aforementioned word.
3. A song written by Sheet Music Boss, and published to YouTube about 4 years ago as of the writing of this definition.

1.
A: "Hey, what letter comes after C again?"
B: "For the love of god, it's D."

2.
A: "Man, is there anybody who DOESN'T make my D wet?"
B: "Bro what the fuck are you on about?"

3.
A: "Have you listened to D?"
B: "Lemme guess, Deez nuts?"
A: "No, it's actually a really good song. Listen to it in your free time!"