Can "snob" be used as a verb?

Snob does not appear as a verb in the OED¹, Wiktionary, Dictionary.com, or Merriam Webster. Even Urban Dictionary doesn't seem to define it as a verb, but only as a noun. So I don't think it's "creeping towards accepted usage", unless it's doing so very, very slowly. (I don't hear either word enough to make a judgement based on personal experience.)

Is using "snob" as a verb forever a no-no?

No. The English language is constantly changing and in flux—just don't expect it to be commonly accepted usage soon.

¹The OED has two definitions for "snob" as a verb, but they are both obsolete and are for completely different words that just happen to share the same spelling (but not etymology, definition, etc.).