There a good discussion here. The acrost pronunciation is cited by the O.E.D. from 1759 as U.S. dialect. There are also some nice quotes of usage by Kipling and Ring Lardner, so it appears to be widespread and well known, if substandard.
There a good discussion here. The acrost pronunciation is cited by the O.E.D. from 1759 as U.S. dialect. There are also some nice quotes of usage by Kipling and Ring Lardner, so it appears to be widespread and well known, if substandard.