DCHP-1 Online
rimrock ((v.)) West, Slang 
1 v. drive (cattle) into a corral, enclosure, etc.
- 1955 With the Vanderhoof stockyards only seven days away, I had a strong feeling that if any outfit could rimrock this drive into the cattle cars, this was the one that would do it.
2 hedge in; cut off; entrap.
See also: rimrock ((n.)) (def. 2)
- 1951 He had spotted a band of at least twenty wild horses . . . rimrocked by a heavy snowfall in a high valley beyond Tatla Lake.
- 1955 With the Vanderhoof stockyards only seven days away, I had a strong feeling that if any outfit could rimrock this drive into the cattle cars, this was the one that would do it.