Computer acronym that means Keyboard, Video, Mouse. Typically used by people who want to sound really elite when they're just plugging in a monitor, mouse, and keyboard
Kvmmies is predominantly used within thatsideofutube's YouTube comment section, where 'mommy' is the person that runs the account and the '(little) kvmmies' are the stans that watch and comment on every video; fans of the YouTuber.