Allusion
- The term "Aunt Agatha" has come to mean a "formidable aunt" or, more generally, "any older woman of fearsome disposition".
- "Aunt Agatha", or "Great Aunt Agatha", is a term sometimes used somewhat disparagingly by workers in the City of London's financial markets to describe a risk-averse, low-volume, non-corporate investor.
- "Aunt Agatha's flying helmet" is used as a raffle box for competition entries in the 'Straight and Level' humour page in Flight International, a British aviation-related trade journal.
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