ph34r t3h cut3 on3s = fear the cute ones
r3du>< = redux
b4k4 = baka = idiot
.md3 is a Quake 3 character skin file type
This is another remake/followup to b4k4.md3, which was used on the original b4k4^2 t-shirt in the long gone MegaTokyo CafePress store with the heading "ph33r the cute ones".