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Flat Tire Shoe

A flat tire is a slang term for the result of stepping on someone’s heel so that their shoe comes loose. This is part of a complete episode.

Think Tank

Since the 1950’s, the term think tank has meant “a research institute.” But even earlier than that, going as far back as the 1880’s, think tank referred “a person’s mind.” Another slang term for one’s...


The slang term stroppy is an adjective meaning “annoying” or “difficult to deal with.” It might be related to the similarly unpleasant word, obstreperous. This is part of a complete episode.

Knowledge Box

Knowledge box is an old slang term for noggin; one 1755  describes someone who “almost cracked his knowledge box.” This is part of a complete episode.

Origin of Slang “Solid”

To “do me a solid” or “do someone a solid,” meaning “to do someone a favor,” may be related to the slang term solid meaning “a trustworthy prison inmate.” This is part of a complete episode.

Massless but Massive

You’re probably aware that massive is simply a slang term for great or large. But for one professional balloon artist who thought that something massive has to contain actual mass, it took some convincing for him to accept that his giant...