I ask because I saw another post here:https://www.bombingscience.com/graffitiforum/threads/one-oner.26358/ and it seems like they mean two different things so it just confused me lol
its merely an extension of "one" writers from brooklyn came up with then it spread, at least that's what i gathered. Oner and one mean the same thing, oner you'd write it to make the whole thing bigger, extended. people write it for different reasons: to show off their R, blah etc.