Bonjour !
Question : Vous venez manger à la maison ?
Answer : Ah, non. On n'a pas faim, nous !
Q = You come to eat at home ?
A = Oh, no ! We're not hungry, us (litterally)
On (3rd pers. singular) , and we at the end to insist that "you are hungry" but "WE are NOT hungry"...
Hope this helps ☺☺☺