The typical music video you find on YouTube is colloquially called “YouTube Poop” for a reason.
colloquially, “Israel” and “the Jewish state” are the same thing, right?
So many of the conductors were Irish immigrants that the IRT was colloquially called the “Irish Rapid Transit.”
pertaining to words or expressions more suitable for speech than writing; in informal, conversational style
colloquial language or speech
Latin colloquium 'speaking together'