SZA celebrated her birthday on Tuesday and used the big day to tease fans with the prospect of new music. As she turned 33 SZA posted a preview of new song "PSA" alongside the caption "Clock starts now." She may well be referring to the countdown to the full track dropping but, as Stereogum points out, SZA's fans think there might be more than just a song coming down the pipeline.
The short "PSA" clip ends with a series of bleeps which, SZA stans versed in dots, dashes, and spaces have deduced, is Morse code for "SOS." That same message was featured in the video for her recent single "Shirt" and the code appears in her Instagram bio, too.
It would appear, given the information presented, that SOS will turn out to be something SZA-related. Perhaps it's an album title. It's either that or she is in peril and resorting to WW2-era messaging to alert people. Only time will tell.