Get Wet Meaning

(idiomatic) Of a woman, to become sexually aroused, as indicated by the occurrence of the natural lubrication of the vagina.

Example: 2004, Karen Hesse, The Music of Dolphins, p. 84:
  Some things can go in the water, like my dolphin boots, but other things, like books, are not so good when they get wet.
2002, Sallie Foley, Sally A. Kope, Dennis P. Sugrue, Sex Matters for Women: A Complete Guide to Taking Care of Your Sexual Self, p. 281:
  Sometimes I get wet right away, but other times I'm aroused but not very wet.