A poorly made message board system coded in PHP. Known for being notoriously filled with security holes and inefficient coding.
XMB is so bad it makes ezBoard look like a million dollars.
by moi August 24, 2003
2 more definitions
'Cross Media Bar' a form of interface, that goes across your screen, usually animated.
Sony VAIO laptops sometimes have XMB's.
by q1w2e3r4 July 21, 2008
aXe My Balls, something people say after they've had intercourse with an animal and need to deodorize them.
Richard: XMB, man, that goat smelled awful
by your face August 01, 2003