YOU SAID:

im so tired i could eat a horse

INTO JAPANESE

私はとても疲れている私は馬を食べることができる

BACK INTO ENGLISH

I am very tired I can eat a horse

INTO JAPANESE

私は馬を食べることができる非常に疲れています

BACK INTO ENGLISH

I am very tired of eating horses

INTO JAPANESE

私は馬を食べるのがとてもうんざりしています

BACK INTO ENGLISH

I am very tired of eating horses