noun
plain-faced; featureless; smooth
Describes a face or surface that is plain, smooth, and lacking distinctive features; often used for a face without makeup or expression.
See also: ずんべら棒
あの子はずべら坊で、化粧っ気がない。
That girl has a plain face and doesn't wear makeup.
noun
slovenly person; slob
Refers to a person who is slovenly, untidy, or careless in appearance or habits; often used teasingly or critically.
彼は部屋も服もずべら坊だ。
He's a slob with both his room and his clothes.