Replacement term for "wife beater," referring to a ribbed, form-fitting tank top (often seen on men). Derived from the numerous stories in the press -whether true or not - of the popular r&b / hip hop singer beating his fairly recent wife and singer, Rihanna.
Andrew: I'm wearing a wife beater under my shirt.
Alyssa: Oh, you're wearing a Chris Brown?
Alyssa: A Chris Brown, you know, the guy who allegedly beat his wife, Rihanna?
Andrew: Oh, I get it. Yea, I always wear Chris Browns under my t-shirts and around the house.