A combination of “thank you” (thx) and xoxo (with love).
Thxoxo is an expression of gratitude, gratefulness, love, and appreciation.
Pronounced “thanks-oh-ex-oh”
Me: Can you give me a ride to the airport tomorrow morning?
My friend: Yes!
Me: Thxoxo!
“Mom, I really appreciate all that you do for me! I absolutely love my birthday gift! Thxoxo!”