An excessively large t-shirt, worn popularly by the hip-hop artist Soulja Boy, that extends beyond the limits of a regularly sized t-shirt. Sizes may vary, although an overestimation is necessary. For example, a Soulja Boy sized t-shirt may be considered an 8XL or a 9XL.
Glenn: Aye Mark, what's up wit the club tonight?
Mark: Its on til the break of dawn!!! What you wearin'?
Glenn: I'm probably just gonna rock my Soulja Boy Tee and get all the hos.
Ex#2: Man look at that lame ass nigga. His shirt is too fuckin' Soulja Boy. Don't nobody wear them no more.