EssentialAF.....what mean?

Adding AF to the end of something is short hand for "As Fuck"

It creates an emphasis on the word. In this instance, in the US they referred to Frontline workers as essential workers. So these people are essential as fuck. Or very very essential

thanks ... i doing

Hi there. Is the EssentialAF needed big and bold on the front or is it to go where a name badge would on the left chest?
I have submitted 3 concept designs. Some feedback would be great. I am going to create a few more for you!

Pls Extend the deadline

I Just love the winning design. Excellent design. Congratulations ArtTank.