When someone hangs their mask off one of their ears
The grocery worker was scolded by his manager fot being half masked while filling the shelves.
Wearing a mask over your mouth, but not your nose.
Dave: Did you see that guy breathing all over the shelves?
Sarah: Yeah, he was flying at half mask.
Someone who you see in a public setting with a mask on but barely on their face or just covering their lips
Dude 1: I was at Costco and this guy had a mask on but it was just slightly covering his mouth.
Dude 2: oh he out here Half Masking