A variant spelling of doohickey; another playful term for an unnamed small object or gadget.
An alternative spelling of doohickey with a slightly different vowel sound, likely created through dialectal variation and the flexibility of spelling for nonsense words.
Nonsense words have surprising freedom in how they're spelled because they don't have standard dictionary origins—people spell them phonetically based on their accent, which is why you'll see 'doohinkey,' 'doohickey,' and similar variants all in use.
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