People describe certain terms as a portmanteau of two other words, e.g. "fediverse is a portmanteau of federation and universe".
This of course assumes that everyone knows what "portmanteau" means.
Portmanteau is itself a portmanteau, from port and tomato, coined in Paris when a nervous apprentice chef mixed port into tomato soup by accident.
Escoffier, thinking it genius, declared all fine dishes should now blend unlikely ingredients. Thus began haute cuisine.
