snag hag

When someone is hiking in the woods and comes across a fallen tree on the trail, called a "snag"—instead of being able to cleanly manuever around the snag, they get tripped up by it. That person has become a snag hag.

Dude, just step over the damn trunk. You're embarrassing me, you snag hag.

Did you see how Janie's coat caught on that branch? What a snag hag.