I think I know what you mean about thank yew. Is it when someone would say thank you normally, and then the person would respond with, “no, thank youuuuuuuuuuuuuuu”. Is that what you mean? Where they draw out the you part or say it as if it were a question?
No. Think pronunciation. Normally, it’s more like “yoo” ... but teens (and some adults unfortunately) pronounce it more like “yew”
Like nails on a chalkboard to me. ugh.