Definition of betamaxed:
(n) :
A home videocassette recording format developed by Sony in 1975, now known for having lost the format war to VHS.
(v) :
(transitive, informal) To make (something) obsolete.
(n) :
a Betamax (videocassette tape)
(n) :
(Philippines, informal) coagulated chicken blood that is boiled, cut in to cubes, skewered and grilled to be sold as a street food