A type of fold in origami whereby a fold is mistakenly made that is not supposed to have been made. It can be due to misremembering instructions or mistaking measurements. More often than not, it will lead to poor results for the origami being made.
Simon: I'm trying to make a paper crane, but I can't seem to get it right.
Lewis: That's because you messed it up. You made a Verigan's fold early on.