What is another word for precious thingummy?
Pronunciation: [pɹˈɛʃəs θˈɪŋɡəmˌi] (IPA) 
The phrase "precious thingummy" is often used to describe an object that is highly valued or cherished. Synonyms for this phrase include "treasure," "keepsake," "souvenir," "heirloom," "memento," and "relic." Each of these words suggests a deep sentimental attachment to the object in question, whether it be a family heirloom passed down through generations, a trinket acquired on a special trip, or a memento of a significant life event. Whatever the case, each "precious thingummy" carries with it a unique emotional weight and serves as a physical reminder of cherished memories and experiences.
