Belarius

Immediate thought that comes to mind: difference
Secondary thought that comes to mind imagining how australia kinda does this: it's a short name for a restaurant
Otherwise no fuckin clue

in... the computer sense?

(we do not meet the criteria for this poll, probably)

a diff is a display of what is different between two files, often used to display what has changed between the most recent committed code and the current working state

Dad I'd fuckin' fuck

i'm canadian and all i can think of is diff like i'd use to get the difference between text files

New Englander (Northeast USian) here, it's computer sense first, then car component, then a general abbreviation of differential (-amplifier, -pair, etc.)

i saw "diff" and "computing" i thought i knew where this was going. i really didn't. lmao

I work in cars, so my first thought is differential