Short for "Young Urban Marxist". A former marxist who now has a high paying public service job with a great pension plan and full benefits. Like their yuppie counterparts they live in big houses and drive big SUVs while still complaining how the system is still sticking it to the poor.
Yummies try to save the environment by using canvas bags while driving their SUVs to the organic supermarket.
A slang term for illegal aliens who sneak into the United States from Canada. The term was used by a hispanic judge in 1996 Sliders episode "As Time Goes By" where in an alternate universe the United States was settled by the Spanish so gringo furbacks were coming from Canada instead of wetbacks from Mexico.