Acronym referring to a girl who is
Down
To
Skull
Fuck
girls are commonly dtsf when they give a face commonly confused with a person having a seizure. This is so because epileptics could probably benifit from getting a good skull fucking
When two men are each sucking on opposite nipples of a girl engaged in a threesome. They alternate between who fingerbangs her. A subtle glaze over the boobs and a wink is always a good plus, showing you are applying DTSFB with some style.