Are there other similar abbreviations like "WBU"?

[Radarro]

Multiple abbreviations including "WBU" exist for use in everyday texting, Some examples here:

1.  HBU – Meaning "How About You?"
2. The acronym "WYD" stands for "What You Doing?"
3. The abbreviation "LMK" functions as a request for individuals to send notice.

So now you know more abbreviations and also their meaning, if you don’t know WBU Meaning
And their use you can read this.