Belonging to the same family of vile sexual acts such as the cleveland steamer and the hot carl. The number one brown jersey consists of engaging in anal intercourse in the rear entry position and then removing the penis, placing it on the female's backside and rocking back and forth to create the likeness of a number one using the fecal matter that has collected on the penis.
"Yeah mutha fucka...I gave that hoe a number one brown jersey last night...and then she turned around and slobbed my jiggaboo pie."
by shame on a n**** January 31, 2003