SAST is a copy of the abbreviation KASP made by kpop fan @neneluvsjisung. SAST means āstray kids and stays tankedā, which is, very obviously, not true.
Stands for Smelly Ass, Smelly Tits An abbreviation used by people online to proudly self-identify that they do not believe in taking showers or baths. Can also be used to describe someone's hygiene.
"I'm a proud member of SAST club. I prefer to spend time being an internet troll instead"
"OMG I try to avoid them as much as possible because of their SAST."