Informal:
* Mic: This is the most common and widely understood slang.
* The mic: Often used when referring to the microphone as a tool or object.
* Stick: A slang term referring to the physical microphone, especially a handheld microphone.
* Boom: Refers to a microphone attached to a boom pole.
More specific:
* Shotgun: A directional microphone, often used in filmmaking.
* Lapel: A small microphone clipped to clothing.
* Wireless: A wireless microphone.
Other options:
* The hot one: A playful way to refer to the microphone, emphasizing its ability to pick up sound.
* The box: Used in specific contexts, like when referring to a large microphone used for recording vocals.
The best slang term to use will depend on the specific situation and who you are talking to.