Definition of "offen"

His old rubber boots wuz all wore offen him, his clothes hangin' in rags and tatters where he had rushed through the woods and swamps, his feet and hands all froze.

1893, Marietta Holley, Samantha at the World's Fair, page 79

"If I tells Pa Satisfied that ye said that, Myry," muttered the boy, "he wouldn't wait for the law to handle Ben Letts — he'd shoot his dum head offen him quicker than a cat can blink."

1909, Grace Miller White, Tess of the Storm Country, page 241

“The one Dooley won offen him.” The marshal stared hard at Dooley, then at Chester, then at his four deputies, then at Mort the undertaker, and finally at Blue, who was gnawing on a steak bone. “You read too many dime novels.”

2018, William W. Johnstone, J. A. Johnstone, Hang Him Twice