Source : Webster's Revised Unabridged Dictionary (1913)

Immodesty \Im*mod"es*ty\, n. [L. immodestia: cf. F. immodestie.]
   Want of modesty, delicacy, or decent reserve; indecency. ``A
   piece of immodesty.'' --Pope.

Source : WordNet®

immodesty
     n 1: the trait of being vain and conceited [ant: {modesty}]
     2: the perverse act of exposing and attracting attention to
        your own genitals [syn: {exhibitionism}]