So "notyeanazip" = "not yea nazi p" without spaces. Meaning: "not yes Nazi p" — awkward, but if "yea" means “yes,” then "not yes" = “no.” So "no Nazi p" — perhaps "p" stands for "please" ? Then "No Nazi please" — an anti-Nazi sentiment.
So, why has NotYeanaZip 2021 garnered so much attention online? There are several possible explanations: notyeanazip 2021