An uninhabited building in a state of disrepair that you wouldn't want to pitch a tent anywhere near, or go anywhere near at night. The word comes from a shortening of the film title 'Blair Witch' because of the building featured in that film. Such a building looks particularly creepy and scary in the dark and on your own.
I'm not sleeping here. There's a blitch in that field.
Don't go in the blitch.
I just heard a noise over near that blitch.
5👍 35👎