the higgs boson 'god' particle
As the final missing component in the Standard Model of physics, the Higgs boson's (you said Higg) discovery required over $14 billion and four decades of research.
The tale behind the name can be traced back to Nobel laureate physicist Leon Lederman, who originally dubbed the elusive Higgs boson as the "Goddamn Particle" to emphasize the challenges faced in detecting it.
This was initially intended to be the title of his book on the subject.