three plastic animals rule
n.— «The “three plastic animals rule” in Christmas display cases seems to confirm that religious symbols must be disrespectfully cheapened to be widely acceptable.» —by Nancy L. Rosenblum Membership and Morals Mar. 30, 1998. (source: Double-Tongued Dictionary)
Further reading
Nancy in Aurora, Colorado, asks: Is there a better term for one’s adult offspring than childrenor kids. The list of expressions she’s pondered includes adult child, progeny, offspring, man-child, woman-child, descendant, successor...
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...