Not Even Wrong
Shared by the wonderful Stormierbones...
From The Dean of Debunking, a book review:
But is string theory true? Peter Woit, a mathematician at Columbia University, has challenged the entire string-theory discipline by proclaiming that its topic is not a genuine theory at all and that many of its exponents do not understand the complex mathematics it employs. String theory, he avers, has become a form of science fiction. Hence his book's title, Not Even Wrong: an epithet created by Wolfgang Pauli, an irascible early 20th-century German physicist. Pauli had three escalating levels of insult for colleagues he deemed to be talking nonsense: "Wrong!", "Completely wrong!" and finally "Not even wrong!". By which he meant that a proposal was so completely outside the scientific ballpark as not to merit the least consideration.
"Not even wrong" is one of my favorite math phrases ever. To also include "it should be intuitively obvious to the most casual observer that this is true", a phrase my calculus professor trotted out as a joke during difficult proofs.