Websters.com has no recognition of/definition for “behanding.” (“Do you mean beheading?”, the site asks.) If Martin McDonagh hadn’t decided to call his latest play A Behanding in Spokane no one on the face of the planet would have ever used the term. (If your right leg has been severed have you been belegged?) I’m fated to see this alleged black comedy, which costars Christopher Walken, Anthony Mackie, Zoe Kazan — no! — and Sam Rockwell, sometime in March.