Someone who completely covers themselves in NIKE brand clothing, usually complimenting those who wear NIKE clothes, and reprimanding those who who wear other brands such as ADIDAS. These people often talk about the NIKE products they want to buy, and emphasize significant statements with a "NIKE BOOM!", or simply "BOOM!"
These people may be completely ignorant to things not pertaining to NIKE and or the sports they play.
Guy 1: "Ryan is such a Nike Squirrel."
Guy 2: "I know, yesterday I wore my Adidas shoes and he ranted for like ten minutes on why Nike is the superior brand."
Guy 3: "I swear he gets a new pair every month, and he tells everyone before he buys them."