"The gesture refers to the act of inserting the index and middle fingers into a vagina and the little finger into the unwitting anus, hence the "shock". Because of its explicit sexual connotation, the shocker is sometimes considered vulgar. Occasionally, the thumb may be positioned so that it may stimulate the clitoris."
The more you know lmaooo...lmao at placing the word unwitting behind anus..wow! And the last sentence made me feel like the biggest noob...never though of that.