It’s really bugging me. What does it mean?

I know that ‘fx’ is read “eff-axe” which just sound like “effects”, so vfx means ‘video effects’ and sfx means ‘sound effects’.

Thought other component frameworks have the same attribute but couldn’t find an occurrence from Vuetify. Then I wondered if it’s a Material Design spec thing, but still failed (from simple Googling).

If I can guess, they explain the ‘sx’ attribute as “The sx prop is a shortcut for defining custom styles that have access to the theme”. So, it wanted to keep ‘s’ from ‘style’, and just ‘blur out’ every charactgers in ‘style’ after ‘s’, so just ‘sx’?

Sorry for non-coding question but this is really bugging me please help.