Andrew Gabriel wrote:

Bill Wright writes:

The brickwork joined the existing building at each side. Somehow it
rose one course on its way round. The whole structure was
skew-whiff.

There's a jargon word that describes this fault in a building,
but I can't remember what it is...

Having a "pig" in it, or a "pig course"?

According to this website, regional variations are "quelks" and
"gorrets" ...

http://www.cavitytrays.co.uk/news/view/39