Someone who will not wear a facemask in public to help prevent the spread of a deadly virus or someone who won't wear them correctly covering their NOSE and MOUTH.
A sheep of a person wearing a mask because government told him to for a pandemic less deadly than the common flu. A Maskhole will run up to you and say you should have a mask on or be quarantined when everyone knows you quarantine the sick not the healthy. You will see Maskholes driving in their cars on the freeway by themselves usually 10mph below the speed limit ignoring the affect they have on people around them. Maskholes are loud and obnoxious, they will get in your face if you don't conform. The best thing to do when approached by a Maskhole yelling at you to put on a mask is let them know you have a medical condition that prevents you from wearing a mask called intelligence..
Look at that Maskhole yelling at that guy to put on a mask while he is eating...
A person who appoints himself or herself the 'mask police' and hollers at or aggressively confront strangers they catch not wearing a mask, such as during the Covid-19 pandemic, in dubious circumstances.
I was out trail running and this maskhole accused me from 20 feet away of trying to kill his grandma