The spelling of the word "boobooed" may seem odd, but it actually follows English phonetic rules. The first syllable is pronounced /bu/ as in "boo", the second syllable is pronounced /bu/ again, and the final syllable is pronounced /d/ as in "dog". Using IPA phonetic transcription, the word would be spelled as /buːbuːd/. "Boobooed" is the past tense of "booboo", meaning to make a mistake, and is commonly used in informal language.
The word "boobooed" does not have an established etymology as it is not a recognized word in mainstream English. However, it appears to be derived from the term "boo-boo", which is a colloquial term used to describe a minor injury, mistake, or blunder. "Boo-boo" is believed to be an onomatopoeic representation of a child's cry or a sound made when experiencing pain. The addition of the "-ed" suffix in "boobooed" likely indicates that someone has made a mistake or had a lapse in judgment. While it may not be found in formal dictionaries, the term is sometimes used informally in casual conversation.