This black Tom Ford sleeveless side slit gown features a round neck, floor-length hem, slit detailing to the side, exposed back, subtle back zip fastening and a slim fit. There are some new initialism rules to know about. LBD now means long black dress. And TF is now Tom Ford. So the phrase of the day is, 'I'd like a TFLBD, please'. (Translation: you'd like this Tom Ford dress, please).