Dictionary.com
definitions

normcore

[nawrm-kawr, -kohr]
noun
  1. a fashion style or way of dressing characterized by ordinary, plain clothing with no designer names, often a reaction against trendy fashion.
  2. clothes that conform to this style: I wear normcore on weekends—usually a t-shirt and jeans.
adjective
  1. 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. 2018

Examples from the Web for normcore

Contemporary Examples of normcore