Noun: A person who looks hot with their mask on, but when they take it off you realize they are not.
Verb: When a person makes you think they were hot, but you realize they trolled you when they take their mask off.
I was gonna ask Susie to come home with me, but when she took her mask off, I realized she was a mask troll.
I saw this hot girl at the bar, but I realized I got mask trolled when she took off her mask.