noun
masker; habitual mask wearer
Slang term for someone who habitually wears a surgical or face mask, often in public or social situations.
彼は花粉症じゃないけど、マスカーだから一年中マスクをしている。
He doesn't have hay fever, but he's a masker, so he wears a mask all year round.
最近、街中にマスカーが増えた気がする。
Lately, I feel like there are more maskers around town.