Hulk Hogan -- Mustache Org. DEVASTATED Over Plans to Shave

Angels will DIE if Hulk Hogan shaves his mustache ... so says the leader of a powerful mustache organization.

TMZ spoke with Dr. Aaron Perlut -- Chairman of the American Mustache Institute and self-professed doctor of "nuclear mustacheology" -- who says he's particularly upset with Hulk's plan to shave ... since he is "seen as a longtime leading figure in the sexually dynamic Mustached American community."

Perlut says, "Not only would the removal of his lower nose foliage cause angels in heaven to die and fall to earth -- as is written in biblical texts -- but it would send a poor message to young people of Mustached American descent who wish to embrace the Mustached American experience."

"We do hope that Mr. Hogan, for whom we have great reverence, reconsiders shaving his upper lip shading device as millions of those he has inspired would be greatly let down, leading to mass chaos and deep bouts of depression in the Mustached American community.”

Neither Hogan nor his mustache could be reached for comment.