The correct spelling of the phrase "doing in to" is actually "doing into." The "t" sound that is often heard is due to the phenomenon of assimilation in English. In this case, the voiced consonant "d" assimilates to the unvoiced consonant "t" in the following word "into." The IPA phonetic transcription of "doing into" would be /ˈdu.ɪŋ ˈɪn.tu/. It's important to remember to spell words correctly, but understanding the phonetic rules behind them can help prevent common mistakes.
"Doing in to" is not a standard dictionary term, and it does not have a universally accepted definition within the English language. It appears to be a phrase or expression that might be employed in colloquial or informal speech, specific to certain regions or dialects. Additionally, it could be a misinterpretation or typo.
However, if we consider it as an abbreviation of "doing something to someone or something," we can propose a definition based on this presumption. In this context, "doing in to" could imply taking action against someone or something with the intention of causing harm, inconvenience, disruption, or sabotaging their efforts or progress in some way.
For example, if someone were to say, "I heard Mary is planning on doing in to John's chances of getting promoted," it could indicate that Mary plans to undermine or sabotage John's chances at securing a promotion at work.
It is important to note that "doing in to" is not a widely recognized phrase or idiom, and its meaning may vary depending on the specific context in which it is used. Therefore, it is advised to seek further clarification or context from the speaker or writer to better understand the intended meaning.