(in the Big Bang theory) the primordial matter of the universe, originally conceived as composed of neutrons at high temperature and density.
1940s: from late Latin hylem (accusative) ‘matter’.
“You could say we’re all just made of ylem!”
Nothingburger (noun) (Chiefly US)
A person or thing of no importance, value, or substance. Now esp.: something which, contrary to expectations, turns out to be insignificant or unremarkable.
1950s: from nothing and burger. Added to the OED October 2018.
Minimal government; specifically a (hypothetical) form of government that does not interfere with individual rights and civil liberties, and that has itself no right to levy taxes upon legitimately acquired property.
1960s; earliest use found in Ralph Borsodi (1888–1977). From min- + -archy.