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, derived from Elizabethan-era street urchins who couldn't afford shoes binding their feet with whatever discarded leather they could scrounge, inevitably smooshing their toes into one big clumpy mass, known as "poor man's toe".
