Sharp as a whistle

A grandmother was talking about her granddaughter, describing her as “sharp as a whistle”. This is a mashup of “sharp as a tack” (very clever or intelligent) and “clean as a whistle” (completely, entirely, or very neat). Perhaps she is smart and super clean? The malaphor is similar to a previous posting, “tight as a whistle”. https://malaphors.com/2022/03/14/security-is-tight-as-a-whistle/

A big thanks to Sam Edelmann who heard this one and passed it along!