A synonym of "roam," "wander," and "ramble," "stravage" (also spelled "stravaig") isn't likely to pop up in your local newspaper-unless you're stravaging in Scotland or one of its neighbors. "Stravage" is not a new word; our earliest evidence of it dates to the late 18th century, when it likely developed by shortening and alteration from the now-archaic word extravagate, a synonym for "stray" and "roam" that can also mean "to go beyond proper limits." Note that if you use it correctly, you won't be extravagating by using "stravage"-no matter where you call home.
Word History
Etymology
probably by shortening & alteration from extravagate