I also had to look it up, but according to urban dictionary it's "when 2 well known celebrities have sex". It sounds like my ex posted some aquatic themed erotica back in the early days of twitter and the guys were using the term very loosely (she has 580 followers...) to flatter her
She messaged me first on Hinge, the mask was off pretty quick but I overlooked/excused the red flags. Astrology and Instagram wellness type that went to college in Los Angeles, by date 5 she had told me "lying comes naturally to us pisces" twice, and that she didn't have a positive relationship with psychology growing up until starting her psych PhD due to her having dissociative identity disorder & dad also being a therapist. However the motivation for the PhD was to charge therapy clients more money.
She ended things after a few months saying "I'm not feeling the way I want to feel", "our energies are too similar", and that she'd "fondly remember me" during the breakup phone call. Turns out she was insulting me on twitter the whole time about my perceived income, said her therapist called me a beta male, and that "these dudes never buy me flowers and act sooooo surprised when I break up with them".
Also used to have blowjobs in her twitter handle & dudes were tweeting at her saying thank you for the starbang, but that was more weird/trashy than shitty or abusive.