Deepdeep

Something that goes beyond the regular word deep, it's very sexual

Have you heard? She went deepdeep, it was the sex

Deepdeep by Enigmatic R November 3, 2011

deep-deep 

Sexual penetration that fringes on being dangerous to the normal function of internal organs.

Betty's dilatated eend was all over it, like it wasn't something to fear... so I gave her the deep-deep.

deep-deep by Mr. Grim May 9, 2005