noun, a situation or event that fails to meet expectations to such a magnitude that it inspires a sense of awe.
verb, to wonder at such a situation or event or to express dismay or disbelief in a loud and/or hysterical manner.
(N)The plan toaxe NASA is a damn shame.It's a Bummarvel for our kid's futures, iffndeed we survive the comin' tribulations
(V)Can you believe these Bummarvelin' Mohos downstairs? We gots ta call the po-po!
(A) He's a total sourpussgasfaceBummarvel