Sentence:  ‘You are not going to be what they call a <WSD>Nut</WSD>, are you?' she inquired with some anxiety, partly with the idea that a <WSD>Nut</WSD> would be an extravagance which her sister's small household would scarcely be justified in incurring [...]. 
Meaning of the word marked with <WSD> tags:  An extravagantly fashionable young man. (1910s-1920s)