nimbomaniac
n.— «Cloudspotters—who prefer the formal name nephologists, or the informal “nimbomaniacs”, even have a name for seeing objects in clouds. “It is called pareidolia—finding meaningful shapes in meaningless objects,” said one American member of the society.» —“Oh I say, what a super nimbus” by Abul Taher Times (London, England) may 14, 2006. (source: Double-Tongued Dictionary)