high-hat 1 adj. , slang Treating others as inferior; acting above others. It was an expensive place to eat, and the customers were likely to be a little high-hat. Jones acted high-hat toward anyone poorer than he.
high-hat 2 v. , slang To treat others as inferior; look down on. After she had married a rich man, Mary high-hatted her former friends. "Don't high-hat me," Fred warned, when Harry began to walk away as if he didn't know him.
Compare: BRUSH OFF.