"What if they're laid up somewheres fixin to drygulch us?"
The prefect place to get drygulched (dry fork of Coyote Gulch)
Public DomainThe perfect place to get drygulched - Credit: G. Thomas

Drygulch is U.S. slang meaning to attack or assault, especially in an ambush.

The term originates from the old American Wild West when bandits were said to kill people as they passed through a dry gulch (a dry river bed).