"Skibidi" refers to a popular dance trend and series of memes associated with the Skibidi Toilet videos created by the YouTube channel DaFuq!?Boom!, which features animated characters and humorous situations. The term "sigma," on the other hand, is often used in social media and internet culture to describe a certain type of male archetype—confident, independent, and self-reliant, often contrasted with the "alpha" male.
The combination of these two terms could refer to a particular meme or trend involving a character or person embodying those traits while participating in the Skibidi dance or vibe. If you have a specific context in mind or want more detailed information, feel free to share!