The full form of yiu is yes, I understand.
The acronym “yiu” is used to represent the phrase “yes, I understand.” It is used as a response to someone telling you something to show that you have understood what they were telling you.

Origin of YIU
There is no specific origin concerning the acronym “yiu” or the phrase that it represents. One can only assume that this response is used so generically and has been used for so long that its definition is inherently known. With the dawn of online communication and texting, the everyday phrases that are popular found themselves shortened to abbreviated terms or acronyms to make them easier, quicker, and more convenient to type.

Other Meanings
There are currently no other known meanings of the acronym “yiu” or the phrase that it represents.

Example Conversations
A text discussion between father and son.

Father: I want you to take the trash out and unload the dishwasher before you leave the house. I also want you home by curfew tonight or there will be consequences.
Son: YIU dad! I will get all of it done and I will make sure I am in the house by 11 pm or before. Thanks, dad!
An online conversation between tw