The best English teacher alive (used as a noun)
John: Hey have you seen our new English teacher?
Dave: No, what's he like?
John: He's a real Mahdi English!
Relating to the 2020 Covid-19 virus:
A legendary person who works in health care and is willing to sacrifice their life to help people fight a virus and receive aid. (Corona+knight)
Also: A legendary person who gets killed because of idiots who don't pay attention to social distancing.
My brother is a real coronight. He hasn't come home since the outbreak of the Coronavirus. I really miss him.