patteran
Patteran (noun) means one of various secret signs left beside a road, or on the house of someone who is not Roma, by one Romani person for another; the most usual form is made of crossed twigs (often from different trees or bushes), showing, for instance, which way someone has gone.
Etymology
From Romani patrin (“leaf”), perhaps specifically from an inflected form like Vlax Romani pateryánsa.