Yesterday actually.....
Someone I didn't know sent me a PM and signed it with "Tia".
At the end of my follow up to that PM, I said, "Is Tia your real name? So pretty. I never had children but that name was on the short list if I had ever had a daughter."
Well the original sender, who I discovered is a male, replied informing me "Tia" means Thanks In Advance.
Is that just a thing that came up since texting became a thing?
Yes but usually they are all caps. TIA, IKR, SMH, BAE, BRB, AFK, EOM, ROTFL, LMAO, LMFAO etc.
Teens and children have almost a complete separate language, such as PIR (Parent in room).
Sometimes I can figure out an acronym if I think about it long enough, but if not I text my granddaughter, who hasn't failed me yet.
I just don't ask her about any that have an F in them. For those I either use urbandictionary.com or type acronym: ROTFL into a search engine, but not the G one. The G one is...never mind. That's off topic.
HTH,
Remmy