normcore

[ nawrm-kawr, -kohr ]
/ ˈnɔrmˌkɔr, -ˌkoʊr /

noun

a fashion style or way of dressing characterized by ordinary, plain clothing with no designer names, often a reaction against trendy fashion.
clothes that conform to this style: I wear normcore on weekends—usually a t-shirt and jeans.

adjective

noting or relating to this style: She’s definitely a normcore dresser.

Origin of normcore

2005–10; norm(al) + (hard)-core (“extreme; hence, rejecting mainstream trends”) or core1 (“something basic or essential”)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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