The Brief: A nigcel is a Black incel. It also refers to hoteps.

DEEP DIVE
A nigcel is a Black incel. It’s similar to the word blincel. The term has also come to refer to hoteps, Black men who are pro-Black, but also sexist and homophobic.
Nigcel is a play on the word incel, which stands for “involuntary-celibate.” This term refers to a subculture of men who are typically white males. These men have difficulty interacting and attracting partners. They tend to spend most of their time online and in chat rooms. Incels are marked by their feelings of entitlement. They often write misogynistic, racist, self-pitying, and self-loathing messages in online forums.
the word “nigcel” has sent me this morning 😭😭😭😭😭
— k (@kayandstuff) November 18, 2020
Actually let me tweets on my burner. I don’t want nigcel’s in my mentions.
— Wanna (@WannasWorld) October 19, 2020
Oh the the dirty dick hotep nigcel finally stfu hope I’ll see you on the next hashtag bye bullet bag tootles😘 pic.twitter.com/L2MeMli5PO
— 𝓢𝓾𝓰𝓲𝓮❂ ⁷ 🌺🍒🍫 (@Sugie_b) November 2, 2020