L.Y.B.B.
L. Y. B. B. means you were so poor last year you probably cried in the mall because you couldn't afford a single toy.
'L. Y. B. B. I cried in the mall because I wanted a PS5 and all I got was a PS2.'
'L. Y. B. B. I cried in the mall because I had to choose between a toy and a sandwich.'
'L. Y. B. B. I cried in the mall because I got a toy and then it broke.'