Glittering dross; superficial trickery; deceptive cleverness.

figurative. Anything fragile, insubstantial, empty, or worthless; a deceptive show.

A fruit (now usually identified with that of the mudar, Calotropis procera (family Apocynaceae)) which, according to legend, appears tempting but…

figurative. Something empty or insubstantial; a delusion; a specious display or tribute.

figurative. Anything showy or attractive with little or no intrinsic worth; something that gives a deceptively fine or glittering appearance.

a false idol.

something insubstantial or illusory.

= Sodom apple, n. 1a.