YOU SAID:

i ate a whole half a pizza, the whole half!

INTO JAPANESE

私は、全体の半分、ピザ、全体の半分を食べた!

BACK INTO ENGLISH

I ate half the pizza the whole half of the whole!

INTO JAPANESE

私は全体の全体の半分半分のピザを食べた!

BACK INTO ENGLISH

I ate half of the whole entire pizza!

INTO JAPANESE

私は全体の全体のピザの半分を食べた!

BACK INTO ENGLISH

I ate half of the whole entire pizza!