The Brief: Panny is shorthand for "pandemic."

Bluesquiggle
DEEP DIVE

The COVID-19 pandemic has inspired a slew of slang terms including Miss Rona, Corn Teen, quarantini, coronacoaster, and panny. Short for “pandemic,” panny is a cute and slightly silly way to talk about the virus.

As with many new words that become popular, “panny” has origins in use by Black people and on Black Twitter.

https://twitter.com/wordtoMae/status/1325641125688995840