Dictionary.com
Thesaurus.com

brand Nazi

British  

noun

  1. informal  a person who insists on buying one particular brand of clothing or other commodity

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Preamble In 1819, when the self-educated mill-worker William Collins began to dream of knowledge for all and chose to devote his life to creating a dictionary, he probably did not envisage a day when it would include words and phrases such as chavtastic, brand Nazi, soz, busty, beer o'clock, Smythchic and LOL.

From The Guardian